End of Development Support

This product is no longer being actively supported by development (End of Development Support) and no further software updates will be provided. Any software or support resources provided by Lenovo are made available “AS IS” and without warranties of any kind, express or implied. Products still covered under the Lenovo Limited Warranty will be covered for repair.

BIOS Update Utility for Windows 8 (32-bit, 64-bit), 7 (32-bit, 64-bit), Vista (32-bit, 64-bit), XP - ThinkPad T420s, T420si

BIOS Update Utility for Windows 8 (32-bit, 64-bit), 7 (32-bit, 64-bit), Vista (32-bit, 64-bit), XP - ThinkPad T420s, T420si

In This Article
Compatible DevicesCompatible Operating SystemsWhat's More
Available Drivers
File name
Size
Version
Operating System
Release Date
Severity
Options

BIOS Update Utility for Windows 8 (32-bit, 64-bit), 7 (32-bit, 64-bit), Vista (32-bit, 64-bit), XP - ThinkPad T420s, T420si

6.424 MB
1.46

Windows 8 (32-bit)

Windows 8 (64-bit)

Windows 7 (32-bit)

Windows 7 (64-bit)

Windows Vista (32-Bit)

Windows Vista (64-Bit)

Windows XP (32-bit)

27 Jun 2018
Critical

BIOS Update Utility

8cuj24us.exe

6.4 MB
1.46

Windows 8 (32-bit)

Windows 8 (64-bit)

Windows 7 (32-bit)

Windows 7 (64-bit)

Windows Vista (32-Bit)

Windows Vista (64-Bit)

Windows XP (32-bit)

27 Jun 2018
Critical

README for BIOS Update Utility

8cuj24us.txt

24.4 KB
1.46

Windows 8 (32-bit)

Windows 8 (64-bit)

Windows 7 (32-bit)

Windows 7 (64-bit)

Windows Vista (32-Bit)

Windows Vista (64-Bit)

Windows XP (32-bit)

27 Jun 2018
Critical

Description

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.

Compatible Devices

Supported ThinkPad Systems

  • T420s, T420si

Compatible Operating Systems

  • Microsoft Windows 8 32-bit, 64-bit
  • Microsoft Windows 7 32-bit, 64-bit
  • Microsoft Windows Vista 32-bit, 64-bit
  • Microsoft Windows XP Professional SP3

What's More

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.

Use the link below to obtain the BIOS in other file formats:

Summary of Changes

Where:

  • UEFI: UEFI BIOS version
  • ECP: Embedded Controller Program version
  • [Important] Important update
  • (New) New function or enhancement
  • (Fix) Correction to existing function

Version 1.46
UEFI: 1.46 / ECP: 1.21

  • [Important] Security fix addresses LEN-22133 Speculative Execution Side Channel Variants 4 and 3a (CVE-2018-3639, CVE-2018-3640). Refer to Lenovo's Security Advisory page for additional information. (https://support.lenovo.com/product_security/home)

Additional Information

Please refer to the README file for the following:

  • Installation Instructions
  • Determining Which Version is Installed
  • Complete list of summary of changes
  • Known limitations (if any)

The following versions of UEFI BIOS and ECP (Embedded Controller Program) have been released to date.

Package UEFI BIOS ECP Release
1.46 1.46 (8CET66WW) 1.21 (8CHT28WW)
1.21 (8YHT28WW)
Current release
1.45 1.45 (8CET65WW) 1.21 (8CHT28WW)
1.21  (8YHT28WW)
8cuj23us.exe
8cuj23us.txt
1.44 1.44 (8CET64WW) 1.21 (8CHT28WW)
1.21 (8YHT28WW)
8cuj22us.exe
8cuj22us.txt
1.43 1.43 (8CET63WW) 1.21 (8CHT28WW)
1.21 (8YHT28WW)
8cuj21us.exe
8cuj21us.txt
1.41 1.41 (8CET61WW) 1.21 (8CHT28WW)
1.21 (8YHT28WW)
8cuj20us.exe
8cuj20us.txt
1.39 1.39 (8CET59WW) 1.21 (8CHT28WW)
1.21 (8YHT28WW)
8cuj19us.exe
8cuj19us.txt
1.38 1.38 (8CET58WW) 1.21 (8CHT28WW)
1.21 (8YHT28WW)
8cuj18us.exe
8cuj18us.txt
1.37 1.37 (8CET57WW) 1.21 (8CHT28WW)
1.21 (8YHT28WW)
8cuj17us.exe
8cuj17us.txt
1.36 1.36 (8CET56WW)  1.21 (8CHT28WW)
1.21 (8YHT28WW)
8cuj16us.exe
8cuj16us.txt
1.35 1.35 (8CET55WW) 1.20 (8CHT27WW) 8cuj15us.exe
8cuj15us.txt
1.34 1.34 (8CET54WW)  1.20 (8CHT27WW) 8cuj14us.exe
8cuj14us.txt
1.31 1.33 (8CET53WW) 1.19 (8CHT26WW)
1.19 (8YHT26WW)
8cuj13us.exe
8cuj13us.txt
1.31 1.31 (8CET51WW) 1.12 (8CHT25WW)
1.12 (8YHT25WW)
8cuj12us.exe
8cuj12us.txt
1.30 1.30 (8CET50WW) 1.12 (8CHT25WW)
1.12 (8YHT25WW)
8cuj11us.exe
8cuj11us.txt
1.29 1.29 (8CET49WW) 1.11 (8CHT24WW)
1.11 (8YHT24WW)
8cuj10us.exe
8cuj10us.txt
1.28 1.28 (8CET48WW) 1.10 (8CHT23WW)
1.10 (8YHT23WW)
8cuj09us.exe
8cuj09us.txt
1.25 1.25 (8CET45WW) 1.09 (8CHT22WW)
1.09 (8YHT22WW)
8cuj06us.exe
8cuj06us.txt
1.13 1.13 (8CET36WW) 1.08 (8CHT21WW)
1.08 (8YHT21WW)
8cuj05us.exe
8cuj05us.txt
1.12 1.12 (8CET35WW) 1.07 (8CHT20WW) 8cuj04us.exe
8cuj04us.txt
1.09 1.09 (8CET32WW) 1.05 (8CHT18WW) 8cuj03us.exe
8cuj03us.txt
1.05 1.05 (8CET28WW) 1.03 (8CHT16WW) 8cuj01us.exe
8cuj01us.txt
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Alias Id: MIGR-77010

Last Modified Date: 05 Mar 2020

Original Publish Date: 26 Oct 2016

Document ID: DS014992

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