Revision : 01 -------------------------------------------------------------------------------- Software name BIOS Update Utility Support model ThinkPad X1 Yoga (Machine types: 20LD, 20LE, 20LF, 20LG) Operating Systems Microsoft Windows 10 64-bit Microsoft Windows 11 Refer to marketing materials to find out what computer models support which Operating Systems. Version 1.52 (UEFI BIOS) 1.21 (ECP) -------------------------------------------------------------------------------- WHAT THIS PACKAGE DOES This package updates the UEFI BIOS (including system program and Embedded Controller program) stored in the ThinkPad computer to fix problems, add new functions, or expand functions as noted below. This package also contains the tool to create a bootable BIOS Flash USB memory key. Please refer to "Instruction US - BIOS flash USB memory key.txt" in the installation folder for detail instruction. This program is language independent and can be used with any language system. -------------------------------------------------------------------------------- CHANGES IN THIS RELEASE Version 1.52 (UEFI BIOS) 1.21 (ECP) [Important updates] - Enhancement to address security vulnerability,CVE-2023-5058. [New functions or enhancements] Nothing [Problem fixes] Nothing -------------------------------------------------------------------------------- DETERMINING WHICH VERSION IS INSTALLED There are two ways to check the UEFI BIOS version and BIOS ID. [Checking on Windows] 1. Hold down the Windows logo key and press X to open a menu at the lower-left area of the screen. 2. Select Control Panel from the menu. 3. Make sure "View by Category" is selected, and select System and Security, select Administrative Tools, and then select System Information. - or - 2. Select Run from the menu. 3. Type msinfo32, and press Enter. 4. On the System Information window, make sure System Summary is selected in the left side of the window. 5. Locate the BIOS version/date line in the right side of the window. "LENOVO BIOS ID (BIOS version), date" will be shown. If you are prompted for an administrator password or confirmation, type your password, or click Continue. [Checking on ThinkPad Setup] 1. Turn on the computer to start Windows. 2. Hold down the Windows logo key. 3. Select Power from the menu. 4. Select Reboot to restart the computer. 5. While the "To interrupt normal startup, press Enter" message is displayed at the lower-left area or lower-center of the screen, press the F1 key. The ThinkPad Setup menu will be displayed. If a password prompt appears, type the correct password. 6. Locate the UEFI BIOS Version line and Embedded Controller Version line. "UEFI BIOS version (BIOS ID)" will be shown on the UEFI BIOS Version line. 7. Turn off the computer. -------------------------------------------------------------------------------- NOTES - Be aware that the OS Optimized Defaults option in the Restart menu of ThinkPad Setup should not be normally changed. Lenovo recommends to use the factory default setting for it, as follows. - OS Optimized Defaults [Enabled] If the OS Optimized Defaults setting is changed, Setup Default by the F9 key will not load the same default configuration, as follows. Furthermore, by the condition of Operating System installation, the computer may not be booted due to the setting change. If your computer runs satisfactorily now, you have no need to change the OS Optimized Defaults option. If you need to change the setting, consider well the effect of the setting change. Affected Setup menu items : "OS Optimized Defaults" setting [Disabled] case [Enabled] case - Security - UEFI BIOS Update Option - Secure RollBack Prevention [Disabled] [Enabled] - Secure Boot - Secure Boot [Disabled] [Enabled] - Startup - UEFI/Legacy Boot [Both] [UEFI Only] - UEFI/Legacy Boot Priority [UEFI First] (Not shown) - CSM Support [Yes] [No] (Caution) If both the Secure Boot option is Enabled and UEFI Secure Boot in the Main menu of ThinkPad Setup is shown as Off, restoring Factory Keys is needed. Do the following to restore Factory Keys. 1. Enter the ThinkPad Setup menu by following steps in [Checking On ThinkPad Setup] in the DETERMINING WHICH VERSION IS INSTALLED section. 2. Select Security, then select Secure Boot. 3. Select Restore Factory Keys, and press Enter. 4. Select Yes to restore Factory keys. 5. Press the F10 key to save configuration and exit. 6. Select Yes. The computer will be restarted automatically. -------------------------------------------------------------------------------- UPDATING THE UEFI BIOS Notes: - If your computer runs satisfactorily now, it may not be necessary to update the UEFI BIOS. To determine if you should update the UEFI BIOS, refer to the Version Information section. - You need an AC adapter and a charged battery pack. - Remove the Power-on password prior to updating the UEFI BIOS in the remote deployment environments. Attention: Do not turn off or suspend the computer until the update has been completed. IF YOU DO THAT WHILE THE UPDATE IS STILL IN PROGRESS, THE SYSTEM BOARD MAY HAVE TO BE REPLACED. Manual Update This section assumes to use Microsoft Edge and Windows Explorer. Downloading file 1. Click once on the underlined file name. Once this is done, some pop-up windows will appear. 2. Follow the instructions on the screen. 3. In the window to choose "Save" or "Save as", click "Save". Once the download has completed, there may or may not be a message stating that the download completed successfully. Extracting file 4. Make sure to be logged on with an administrator account on the target computer. 5. Make sure the AC adapter is firmly connected to the target computer. 6. Open a Windows Explorer and select "Downloads" from "Quick access". 7. Locate the file that was downloaded and double-click it. 8. Follow the instructions on the screen. 9. In Extract or Install? window, select "Install", click Next, and move to step 13 to continue installation. Or, select "Extract only" and click Next to extract and keep the files on the specified folder. 10. In the Select Destination Location window, click Extract. If you would like to select a different folder, click Browse. 11. All the necessary files will be extracted to the folder selected in the step 10. 12. Click Finish. Updating the UEFI BIOS 13. In the Ready to Install window, click Install. All the necessary files will be extracted to the temporary folder BIOS will be ready to update. Extracted files will be deleted after installation. 14. Click Finish. 15. Follow the instructions on the screen. 16. Select 'Update ThinkPad BIOS' and follow the instructions on the screen. 17. The program shows a message 'System program update is continued by BIOS at the next reboot'. 18. Click OK. The computer will be restarted automatically and the EFI BIOS will be updated. Unattended Update This is for system administrators' use only. 1. Refer to the Manual Update section, and download and extract the file. 2. At the command line, execute WINUPTP.EXE with the -s option. Example: [Path where the files were extracted]\WINUPTP -s 3. Restart or fully shut down the computer. Note: Make sure to restart or fully shut down the computer to complete the BIOS update. If hybrid shutdown is made after the BIOS update on Windows 10, the update will not be done correctly. Full shutdown can be done with the following command at the command line on Windows 10. Shutdown /s /t 0 To view the update result, refer to the WINUPTP.log file created at the same directory of the package. -------------------------------------------------------------------------------- INITIALIZING UEFI BIOS UEFI BIOS Initialization is suggested for some problems. To initialize the UEFI BIOS settings: 1. Turn on the computer to start Windows. 2. Hold down the Windows logo key. 3. Select Power from the menu. 4. Select Reboot to restart the computer. 5. While the "To interrupt normal startup, press Enter" message is displayed at the lower-left area or lower-center area of the screen, press the F1 key. The ThinkPad Setup menu will be displayed. If a password prompt appears, type the correct password. 6. Press the F9 key to load default configuration. 7. Select Yes. 8. Press the F10 key to save default configuration and exit. 9. Select Yes. 10. Restart the computer. Note: After initialization you may need to reapply some settings that you had changed previously. -------------------------------------------------------------------------------- VERSION INFORMATION The following versions of UEFI BIOS and ECP (Embedded Controller Program) have been released to date. Package ID UEFI BIOS (BIOS ID) ECP (ECP ID) Rev. Issue Date ---------- ------------------- --------------- ---- ---------- N25UJ44W 1.52 (N25ET66W) 1.21 (N25HT33W) 01 2023/11/10 N25UJ43W_V2 1.51 (N25ET65W) 1.21 (N25HT33W) 02 2023/10/20 N25UJ43W 1.51 (N25ET65W) 1.21 (N25HT33W) 01 2023/09/08 N25UJ42W 1.50 (N25ET64W) 1.21 (N25HT33W) 01 2023/08/08 N25UJ41W 1.49 (N25ET63W) 1.21 (N25HT33W) 01 2023/01/12 N25UJ40W 1.48 (N25ET62W) 1.21 (N25HT33W) 01 2022/10/11 N25UJ39W 1.47 (N25ET61W) 1.21 (N25HT33W) 01 2022/08/15 N25UJ38W 1.46 (N25ET60W) 1.21 (N25HT33W) 01 2022/06/02 N25UJ37W 1.45 (N25ET59W) 1.21 (N25HT33W) 01 2021/12/27 N25UJ36W 1.44 (N25ET58W) 1.21 (N25HT33W) 01 2021/11/11 N25UJ35W 1.43 (N25ET57W) 1.21 (N25HT33W) 01 2021/08/26 N25UJ34W 1.42 (N25ET56W) 1.21 (N25HT33W) 01 2021/07/06 N25UJ33W 1.42 (N25ET56W) 1.20 (N25HT32W) 01 2021/05/28 N25UJ32W 1.41 (N25ET55W) 1.20 (N25HT32W) 01 2020/11/05 N25UJ31W 1.40 (N25ET54W) 1.19 (N25HT31W) 01 2020/07/08 N25UJ30W 1.38 (N25ET52W) 1.19 (N25HT31W) 01 2020/06/11 N25UJ28W 1.38 (N25ET52W) 1.17 (N25HT29W) 01 2019/12/23 N25UJ27W 1.37 (N25ET51W) 1.17 (N25HT29W) 01 2019/11/14 N25UJ26W 1.36 (N25ET50W) 1.16 (N25HT28W) 01 2019/08/23 N25UJ25W 1.35 (N25ET49W) 1.15 (N25HT27W) 01 2019/06/13 N25UJ23W 1.34 (N25ET48W) 1.14 (N25HT26W) 01 2019/05/22 N25UJ22W 1.33 (N25ET47W) 1.14 (N25HT26W) 01 2019/05/16 N25UJ20W 1.30 (N25ET44W) 1.13 (N25HT25W) 01 2019/03/07 N25UJ19W 1.29 (N25ET43W) 1.12 (N25HT24W) 01 2019/02/19 N25UJ17W 1.27 (N25ET41W) 1.09 (N25HT21W) 01 2018/11/16 N25UJ16W 1.25 (N25ET39W) 1.09 (N25HT21W) 01 2018/10/25 N25UJ15W 1.24 (N25ET38W) 1.08 (N25HT20W) 01 2018/08/24 N25UJ14W 1.21 (N25ET35W) 1.08 (N25HT20W) 01 2018/06/22 N25UJ13W 1.20 (N25ET34W) 1.08 (N25HT20W) 01 2018/06/12 N25UJ12W 1.19 (N25ET33W) 1.08 (N25HT20W) 01 2018/05/24 N25UJ10W 1.12 (N25ET26W) 1.06 (N25HT18W) 01 2018/04/18 N25UJ09W 1.11 (N25ET25W) 1.06 (N25HT18W) 01 2018/04/04 N25UJ08W 1.11 (N25ET25W) 1.05 (N25HT17W) 01 2018/03/23 N25UJ07W 1.10 (N25ET24W) 1.05 (N25HT17W) 01 2018/03/09 N25UJ06W 1.09 (N25ET23W) 1.04 (N25HT16W) 01 2018/02/13 N25UJ04W 1.07 (N25ET21W) 1.01 (N25HT14W) 01 2018/01/23 Note: Revision number (Rev.) is for administrative purpose of this README document and is not related to software version. There is no need to upgrade this software when the revision number changes. To check the version of UEFI BIOS and Embedded Controller Program, refer to the Determining which version is installed section. Summary of Changes Where: < > Package ID UEFI: UEFI BIOS version ECP: Embedded Controller Program version [Important] Important update (New) New function or enhancement (Fix) Correction to existing function UEFI: 1.52 / ECP: 1.21 - [Important] Enhancement to address security vulnerability,CVE-2023-5058. UEFI: 1.51 / ECP: 1.21 - [Important] Enhancement to address security vulnerability,CVE-2023-35841. UEFI: 1.51 / ECP: 1.21 - [Important] Enhancement to address security vulnerability,CVE-2021-38575. - [Important] Enhancement to address security vulnerability,CVE-2021-38578. - [Important] Enhancement to address security vulnerability,CVE-2021-42299. - (New) Updated the Diagnostics module to version 04.31.000. UEFI: 1.50 / ECP: 1.21 - [Important] Enhancement to address security vulnerability,CVE-2018-0739. - [Important] Enhancement to address security vulnerability,CVE-2022-38087. - [Important] Enhancement to address security vulnerability,CVE-2022-40982. - [Important] Enhancement to address security vulnerability,CVE-2022-37343,CVE-2022-44611, CVE-2022-27879,CVE-2022-38083,CVE-2022-43505. - [Important] Enhancement to address security vulnerability,CVE-2023-28005. - [Important] Enhancement to address security vulnerability,CVE-2022-36763,CVE-2022-36764. - [Important] Enhancement to address security vulnerability,CVE-2022-36765. - (New) Updated the Diagnostics module to version 04.30.000. - (New) Updated the CPU microcode. <1.49> UEFI: 1.49 / ECP: 1.21 - [Important] Enhancement to address security vulnerability, CVE-2017-5715, CVE-2022-33894, CVE-2022-34301, CVE-2022-34302, CVE-2022-34303. - (New) Updated the Diagnostics module to version 04.27.000. <1.48> UEFI: 1.48 / ECP: 1.21 - [Important] Update includes a security fix. - (New) Updated the Diagnostics module to version 04.26.000. <1.47> UEFI: 1.47 / ECP: 1.21 - [Important] Update includes a security fix. - (New) Updated the Diagnostics module to version 04.25.000. <1.46> UEFI: 1.46 / ECP: 1.21 - [Important] Enhancement to address security vulnerability, CVE-2022-21151, CVE-2022-0005. - (New) Updated the Diagnostics module to version 04.24.000. - (New) Updated the CPU microcode. - (Fix) Fixed an issue where device firmware update via Windows Update failed when OPAL management software is installed. <1.45> UEFI: 1.45 / ECP: 1.21 - [Important] Update includes a security fix. - (New) Updated the CPU microcode. <1.44> UEFI: 1.44 / ECP: 1.21 - [Important] Update includes a security fix. - (New) Updated the Diagnostics module to version 04.18.000. - (New) Added support of Microsoft Windows 11 OS. <1.43> UEFI: 1.43 / ECP: 1.21 - [Important] Update includes a security fix. <1.42-1.21> UEFI: 1.42 / ECP: 1.21 - [Important] Update includes a security fix. - (Fix) Fixed an issue where some monitor might not connected properly. <1.42> UEFI: 1.42 / ECP: 1.20 - [Important] Addresses CVE-2020-24511 and CVE-2020-24512. (https://cve.mitre.org/cgi-bin/cvename.cgi?name=2020-24511) (https://cve.mitre.org/cgi-bin/cvename.cgi?name=2020-24512) - (New) Updated the CPU microcode. - (New) Updated the Diagnostics module to version 04.17.000. <1.41> UEFI: 1.41 / ECP: 1.20 - [Important] Addresses CVE-2020-8696 and CVE-2020-8698. (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8696) (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8698) - [Important] Addresses CVE-2020-0587, CVE-2020-0588, CVE-2020-0590, CVE-2020-0591, CVE-2020-0592, and CVE-2020-0593. (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-0587) (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-0588) (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-0590) (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-0591) (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-0592) (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-0593) - (New) Updated the CPU microcode. - (New) Updated the Diagnostics module to version 04.15.000. - (Fix) Fixed an issue where ThinkVision T24m-10 monitor might not connected properly. <1.40> UEFI: 1.40 / ECP: 1.19 - [Important] Addresses CVE-2020-0548. (https://cve.mitre.org//cgi-bin//cvename.cgi?name=CVE-2020-0548) - [Important] Addresses CVE-2020-0549. (https://cve.mitre.org//cgi-bin//cvename.cgi?name=CVE-2020-0549) - [Important] Addresses CVE-2020-0543. (https://cve.mitre.org//cgi-bin//cvename.cgi?name=CVE-2020-0543) - [Important] Update includes security fixes. - (New) Updated the Diagnostics module to version 04.12.001. - (Fix) Fixed an issue where a system hardware controller device might disappear from Device Manager at 2nd boot. <1.38-1.19> UEFI: 1.38 / ECP: 1.19 - [Important] Addresses CVE-2019-6173 and CVE-2019-6196. (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6173) (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6196) Refer to Lenovo's Security Advisory page for additional information about LEN-27431 "DLL Search Path and Symbolic Link Vulnerabilities". (https://support.lenovo.com/us/en/product_security/LEN-27431) (Note) Vulnerabilities exploitable only during installation. Previously installed version is not vulnerable to these CVEs. - (Fix) Fixed an issue where ThinkVision P44w might show flickering symptom about 10~30 sec when connected via Type-C cable. <1.38> UEFI: 1.38 / ECP: 1.17 - [Important] Addresses CVE-2019-0185. (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-0185) Refer to Lenovo's Security Advisory page for additional information about LEN-27714 "Multi-vendor BIOS Security Vulnerabilities". (https://support.lenovo.com/us/en/product_security/LEN-27714) - [Important] Addresses CVE-2019-14607. (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14607) - [Important] Security fix addresses LEN-29406 "ST Microelectronics TPM Firmware ECDSA Signature Generation Vulnerability". Refer to Lenovo's Security Advisory page for additional information. (https://support.lenovo.com/us/en/solutions/LEN-29406) - (New) Supported BIOS password authentication before entering into MEBx. - (New) Updated the Diagnostics module to version 04.11.000. <1.37> UEFI: 1.37 / ECP: 1.17 - [Important] Addresses CVE-2019-0151 (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-0151) - [Important] Addresses CVE-2019-0152 (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-0152) - [Important] Addresses CVE-2019-0123 (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-0123) - [Important] Addresses CVE-2019-0124 (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-0124) - [Important] Addresses CVE-2019-0117 (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-0117) - [Important] Addresses CVE-2019-0184 (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-0184) Refer to Lenovo's Security Advisory page for additional information about LEN-27714 "Multi-vendor BIOS Security Vulnerabilities". (https://support.lenovo.com/us/en/product_security/LEN-27714) - [Important] Update includes a security fix. - (New) Updated the CPU microcode. - (Fix) Fixed an issue where the screen might not be displayed on Thinkpad LCD when opened lid just before startup Windows. - (Fix) Fixed an issue where the Always On USB port might not work when Powered on with AC Attach. - (Fix) Fixed an issue where monitors attached to ThinkPad Docking Stations are disconnected when battery charging is reached to 100%. <1.36> UEFI: 1.36 / ECP: 1.16 - [Important] Update includes a security fix. - (Fix) Fixed an issue where system may enter shutdown after press power button of Thunderbolt 3 Dock Gen2/Thunderbolt 3 Workstation Dock to resume sleep state. <1.35> UEFI: 1.35 / ECP: 1.15 - (Fix) Fixed an issue where external monitor might blink or disconnect while connected via USB-C cable. - (Fix) Change Setup item wording from "Modern Standby" to "Sleep State" in ThinkPad Setup - Config - Power. (Note) "Linux" option is optimized for Linux OS, Windows user must select "Windows 10" option. <1.34> UEFI: 1.34 / ECP: 1.14 - (Fix) Fixed an issue where Modern Standby setting worked oppositely. <1.33> UEFI: 1.33 / ECP: 1.14 - [Important] Enhancement to address security vulnerability CVE-2018-12126. (https://cve.mitre.org//cgi-bin//cvename.cgi?name=CVE-2018-12126) - [Important] Enhancement to address security vulnerability CVE-2018-12127. (https://cve.mitre.org//cgi-bin//cvename.cgi?name=CVE-2018-12127) - [Important] Enhancement to address security vulnerability CVE-2018-12130. (https://cve.mitre.org//cgi-bin//cvename.cgi?name=CVE-2018-12130) Refer to Lenovofs Security Advisory page for additional information about LEN-26696 "Microarchitectural Data Sampling (MDS) Side Channel Vulnerabilities" (https://support.lenovo.com/us/en/product_security/LEN-26696). - (New) Updated the CPU microcode. - (New) Updated the Diagnostics module to version 04.08.000. - (New) Support Optimized Sleep State for Modern Standby in ThinkPad Setup - Config - Power. (Note) "Enabled" selection is optimized for Windows OS, "Disabled" selection is optimized for Linux OS. - (Fix) Fixed an issue where system might automatically wake up right after shutdown. - (Fix) Fixed an issue where Thunderbolt 3 Dock Gen2/Thunderbolt 3 Workstation Dock LAN device might not be recognized as boot device when system in legacy boot mode. - (Fix) Fixed an issue where system might hang up at POST when some KVM device was connected. - (Fix) Fixed an issue where system might not wake from suspend by power button. <1.30> UEFI: 1.30 / ECP: 1.13 - [Important] Update includes a security fix. - (Fix) Fixed an issue where incorrect wattage is displayed when attach an AC adaptor. <1.29> UEFI: 1.29 / ECP: 1.12 - [Important] Update includes a security fix. - (New) Updated the Diagnostics module to version 04.06.000. - (Fix) Fixed an issue where thermal throttling started to happen at 85C degree. - (Fix) Fixed an issue where keyboard backlight might not work properly. <1.27> UEFI: 1.27 / ECP: 1.09 - (New) Updated the CPU microcode. - (New) Updated the Diagnostics module to version 04.04.001. - (New) BootOrderLock was shown as Enable in WMI command if Device Guard was enabled. - (Fix) Fixed an issue where the system might hang up when Thunderbolt BIOS Assist Mode was changed on Diagnostics Boot Mode. <1.25> UEFI: 1.25 / ECP: 1.09 - [Important] Update includes a security fix. - [Important] Added Hyper Threading enable/disable option to ThinkPad Setup for virtualized system users in order to address LEN-24163 L1 Terminal Fault Side Channel Vulnerabilities (CVE-2018-3646). Refer to Lenovo's Security Advisory page for additional information.(https://support.lenovo.com/us/en/solutions/LEN-24163) - (New) Updated the Diagnostics module to version 04.00.001. - (New) Support WWAN Enable/Disable in ThinkPad Setup - Security - I/O Port Access. (Note) If your system has L850-GL Wireless WAN (Mobile Broadband) device integrated, please install the latest device driver which version is newer than equal 0.9.4.89. - (Fix) Fixed an issue where BIOS silent update might fail with system account. - (Fix) Fixed an issue where the system may not unlock by TPM pin code. - (Fix) Fixed an issue where the system might display the error message "The connected AC adapter has a lower wattage than the recommended AC adapter". <1.24> UEFI: 1.24 / ECP: 1.08 - [Important] Update includes a security fix. - (New) Support TPM firmware update by utility. - (New) Support AMT Global Disable feature. (Note) Intel Management Engine v11.8.50.3460 is required. - (Fix) Improve power control. - (Fix) Fix an issue where Wireless LAN device is disabled at boot when "Disable new DMA devices when this computer is locked" is enabled at Group Policy on Windows 10 Version 1703. - (Fix) Fix an issue where BIOS POST might display the error message "Boot Manager recover from an error." - (Fix) Fix an issue where BIOS POST might display the error message "1802: Unauthorized network card is plugged in - Power off and remove the network card (8086/7360/0000/0000)." <1.21> UEFI: 1.21 / ECP: 1.08 - (Fix) Fixed an issue where USB-C Travel hub USB port has no function with Thunderbolt BIOS Assist Mode enabled. <1.20> UEFI: 1.20 / ECP: 1.08 -[Important] Security fix addresses LEN-22133 Speculative Execution Side Channel Variants 4 and 3a (CVE-2018-3639, CVE-2018-3640). Refer to Lenovofs Security Advisory page for additional information. (https://support.lenovo.com/product_security/home) <1.19> UEFI: 1.19 / ECP: 1.08 - (New) Support Wake on Voice feature - (Fix) Fixed an issue where Ethernet is unstable when network boot was tried before Windows boot in Legacy boot mode. - (Fix) Fixed an issue where the system may hang when entering to BIOS setup menu with USB keyboard at Legacy boot. - (Fix) Fixed an issue where the system may not wake by Thunderbolt device after BIOS load default. - (Fix) Fixed an issue where keyboard backlight is blinking at resume. - (Fix) Fixed an issue where FAN rotates too loud. <1.12> UEFI: 1.12 / ECP: 1.06 - (New) Updated Regulatory Information <1.11-1.06> UEFI: 1.11 / ECP: 1.06 - (Fix) Fix an issue where system performance may become low when ThinkPad Dock is attached. <1.11> UEFI: 1.11 / ECP: 1.05 - [Important] Security fix addresses LEN-19568 Intel Active Management Technology MEBx Access Control Bypass. - (New) Support of Fibocom L850-GL WWAN device (Note) Do not downgrade BIOS to the version before 1.14 with the Fibocom L850-GL WWAN device because system may not work properly. - (New) Updated the Diagnostics module to version 03.12.003. - (New) Supported Pre-Boot ACL option for Thunderbolt device on pre-boot environment in ThinkPad Setup - Config - Thunderbolt 3. (Note) To use this feature, System need to update Thunderbolt software to version 17.3.73.350 or higher and Thunderbolt firmware to NVM 10 or higher. - (Fix) Fix an issue where system may become hot by system interrupts when Thundrebolt is disabled in ThinkPad Setup - Security - I/O Port Access. <1.10> UEFI: 1.10 / ECP: 1.05 - [Important] Enhancement to address CVE-2017-5715. - (Fix) Fix an issue where "PC isn't charging." message might be displayed when system stops charging the battery. <1.09> UEFI: 1.09 / ECP: 1.04 - (New) Updated the Diagnostics module to version 03.12.002. <1.07> UEFI: 1.07 / ECP: 1.01 - (New) Initial release for ThinkPad X1 Yoga (Machine types: 20LD, 20LE, 20LF, 20LG). -------------------------------------------------------------------------------- LIMITATIONS Nothing. -------------------------------------------------------------------------------- TRADEMARKS * Lenovo, ThinkPad and ThinkVantage are registered trademarks of Lenovo. * Microsoft and Windows are registered trademarks of Microsoft Corporation. * Microsoft Edge is a trademark of Microsoft Corporation. Other company, product, and service names may be registered trademarks, trademarks or service marks of others.