Lenovo ThinkPad X1 Carbon Gen 13

Firmware History

1. 1.22

   2026-02-10

   <N4BUJ25W> System Firmware Version : 1.22 UEFI: 1.41 / ECP: 1.38 / MEFW: 20.0.5.1628 / PDFW: 1.14 / TBT RetimerFW: 1.25.01.01 - [Important] Enhancement to address security vulnerability, CVE-2025-31648. - [Important] Enhancement to address security vulnerability, CVE-2025-11381, CVE-2025-11382, CVE-2025-11383, CVE-2025-11384. - [Important] Enhancement to address security vulnerability, CVE-2025-32008, CVE-2025-20080, CVE-2025-27708. (Note) If the System Firmware has been updated to version 1.22 or higher, it is no longer able to roll back to the version before 1.22. - (New) Updated the CPU microcode. (Note) Above update will show "BIOS Self Healing backup progressing" message and bar on screen during BIOS update process. - (New) Updated Lenovo Diagnostics tool to 4.44.000. - (New) Updated UEFI CA for Lenovo Cloud Server. - (New) Updated the message displayed when a non‑recommended wattage AC adapter is connected. <N4BUJ23W> System Firmware Version : 1.20 UEFI: 1.40 / ECP: 1.37 / MEFW: 20.0.0.1482 (with TBT FW update) / PDFW: 1.14 / TBT RetimerFW: 1.25.01.01 - (Fix) Corrected MEFW Version information on Readme file. <N4BUJ23W> System Firmware Version : 1.20 UEFI: 1.40 / ECP: 1.37 / MEFW: 20.0.0.1482 (with TBT FW update) / PDFW: 1.14 / TBT RetimerFW: 1.25.01.01 - [Important updates] Enhancement to address security vulnerability, CVE-2025-10237. (Note) If the UEFI BIOS has been updated to version 1.40 or higher from version 1.39 and older, it is no longer able to roll back to the version before 1.40. (Note) Above update will show "BIOS Self Healing backup progressing" message and bar on screen during BIOS update process. - (New) Supported new WWAN card. - (New) Updated WiFi 5GHz support for China. - (New) Updated the Diagnostics module to version 04.43.000. - (Fix) Fixed an issue where a specific monitor could not be detected. <N4BUJ22W> System Firmware Version : 1.19 UEFI: 1.39 / ECP: 1.36 / MEFW: 20.0.0.1482 (with TBT FW update) / PDFW: 1.13 / TBT RetimerFW: 1.25.01.00 - [Important] Enhancement to address security vulnerability, CVE-2025-3052, CVE-2025-2295, CVE-2025-10237, CVE-2025-10238 - (New) Supported Synaptics TrackPoint Firmware Windows Update. - (Fix) Added a temporary solution to prevent PDFW update failures. <N4BUJ19W> System Firmware Version : 1.16 UEFI: 1.37 / ECP: 1.35 / MEFW: 20.0.0.1482 (with TBT FW update) / PDFW: 1.13 / TBT RetimerFW: 1.25.01.00 - [Important] Enhancement to address security vulnerability, CVE-2025-24495, CVE-2025-20012, CVE-2024-38805, CVE-2024-7344, CVE-2024-39356, CVE-2024-39271 - (New) Supported On Screen Keyboard on Microsoft Windows Bitlocker screen. - (New) Updated Efficiency Optimizer Whitelist. - (New) Updated the CPU microcode. - (New) Updated Intel UEFI Wi-Fi driver. - (New) Supported Panel Replay feature for ThinkVision products. - (Fix) Fixed an issue where BSOD 0x1E occurred intermittently. - (Fix) Fixed an issue where Intel AMT is not disabled with Load setup default in BIOS Setup. - (Fix) Fixed an issue where 2100 SSD detection error may happen with specific SSD. - (Fix) Fixed an issue where a USB 3.2 device is not detected in Boot Menu. <N4BUJ17W> System Firmware Version : 1.14 UEFI: 1.34 / ECP: 1.35 / MEFW: 20.0.0.1482 (with critical update) / PDFW: 1.12 - (New) Supported Press to Talk Copilot Key Feature. - (Fix) Fixed the issue with the '?/。' key not inputting and the Fn key lock/unlock function on the Canadian French Multilingual and Brazilian Portuguese keyboard layouts. - (Fix) Fixed the issue where the USB-C security Hot Key functioned during Quick Clean mode. - (Fix) Fixed the issue where the System Firmware Update Utility failed to update the MEFW when AMT was disabled. <N4BUJ15W> System Firmware Version : 1.12 UEFI: 1.34 / ECP: 1.32 / MEFW: 20.0.0.1482 (with critical update) / PDFW: 1.12 - (Fix) Fixed an issue wherein BSOD 0xA intermittently encountered during reboot. <N4BUJ14W> System Firmware Version : 1.11 UEFI: 1.34 / ECP: 1.32 / MEFW: 20.0.0.1482 / PDFW: 1.12 - (New) Improved System Firmware update functionality. - (New) Supported new Thermistor. <N4BUJ12W> System Firmware Version : 1.08 UEFI: 1.31 / ECP: 1.30 / MEFW: 20.0.0.1482 / PDFW: 1.12 - (New) Supported displaying messages during Memory Re-training - (New) Updated Lenovo Diagnostics tool to 4.39.000. - (Fix) Fixed Hanja mode support for Korean keyboard. - (Fix) Fixed an issue wherein there is no WiAMT connectivity while in Sx/Hx state while using WPA3 Enterprise GCMP Profile. - (Fix) Fixed an issue wherein USB4 Storage devices aren't enumerating on Windows 10. <N4BUJ11W> System Firmware Version : 1.06 UEFI: 1.30 / ECP: 1.29 / MEFW: 20.0.0.1472 / PDFW: 1.12 - [Important] Enhancement to address security vulnerability, CVE-2024-38796. - (New) Updated Regulatory Information. - (New) Updated the CPU microcode. (Note) Above update will show "BIOS Self Healing backup progressing" message and bar on screen during BIOS update process. - (Fix) Fixed an issue wherein BSOD 0x20001 (Hypervisor error) was encountered due to incomplete processor SRAM transactions. - (Fix) Fixed an issue wherein Low PKGC10 residency was encountered during modern standby when customer is using specific micron SSD. <N4BUJ10W_V2> System Firmware Version : 1.05 UEFI: 1.29 / ECP: 1.29 / MEFW: 20.0.0.1410 / PDFW: 1.12 - [Important] Fixed an issue where BIOS Update Utility will be blocked by Microsoft "Vulnerable Driver Blocklist”. <N4BUJ10W> System Firmware Version: 1.05 UEFI: 1.29 / ECP: 1.29 / MEFW: 20.0.0.1410 / PDFW: 1.12 - (New) Initial release for ThinkPad X1 2-in-1 Gen 10 (Machine types: 21NU, 21NV). - (New) Supported Multi-certificate in UEFI BIOS Authentication. - (New) Supported Pluton Security Processor configuration in UEFI BIOS Setup. - (New) Supported Single Capsule Update feature. - (New) Supported Fool Proof Fn Ctrl feature. Fn+A, Fn+C, Fn+F, Fn+V, Fn+X, Fn+Z can work as Ctrl+A, Ctrl+C, Ctrl+F, Ctrl+V, Ctrl+X, Ctrl+Z. - (New) Supported new CPU and Features. - (New) Updated the CPU microcode. - (New) Supported new Wireless devices, LCD panels.