CVE-2024-20666

MEDIUM EXPLOITED

Windows 10 1507-22H2 and Windows 11 21H2-23H2 - BitLocker Security Feature Bypass

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2024-20666 has been observed exploited in the wild (reported by VulnCheck KEV). EIP tracks 3 public exploits from researchers including nnotwen, tazxtazxedu, invaderslabs.

AI-analyzed exploit summary This repository contains a PowerShell script designed to patch the Windows Recovery Environment (WinRE) to mitigate CVE-2024-20666, a BitLocker bypass vulnerability. The script checks for TPM-based protectors, verifies file versions, and applies necessary updates to the WinRE image.

Description

BitLocker Security Feature Bypass Vulnerability

Exploits (3)

nomisec WORKING POC 4 stars
by nnotwen · poc
https://github.com/nnotwen/Script-For-CVE-2024-20666

This repository contains a PowerShell script designed to patch the Windows Recovery Environment (WinRE) to mitigate CVE-2024-20666, a BitLocker bypass vulnerability. The script checks for TPM-based protectors, verifies file versions, and applies necessary updates to the WinRE image.

Classification
Working Poc 95%
Attack Type
Other
Complexity
Moderate
Reliability
Reliable
Target: Windows Recovery Environment (WinRE) on Windows 10/11
Auth required
Prerequisites: Administrative privileges · Access to the target system · BitLocker enabled with TPM-based protector
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 1 stars
by tazxtazxedu · poc
https://github.com/tazxtazxedu/WinRE-Fix

This repository contains a PowerShell script designed to fix Windows Recovery Environment (WinRE) partition issues related to CVE-2024-20666, KB5034441, and KB5028997. The script automates the process of moving/recreating the WinRE partition to resolve update failures and BitLocker-related issues.

Classification
Working Poc 95%
Attack Type
Other
Complexity
Moderate
Reliability
Reliable
Target: Windows 10 (1903+), Windows 11, Windows Server 2016/2019/2022/2025
Auth required
Prerequisites: Administrator privileges · GPT disk · UEFI boot mode · Minimum 1.2 GB unallocated space on Disk 0
devstral-2 · analyzed Feb 19, 2026 Full analysis →
nomisec SCANNER 1 stars
by invaderslabs · poc
https://github.com/invaderslabs/CVE-2024-20666

The repository contains a PowerShell script that checks if the Windows Recovery Environment (WinRE) has been patched against CVE-2024-20666 by comparing the installed version and build against known affected versions. It does not exploit the vulnerability but scans for its presence.

Classification
Scanner 95%
Attack Type
Info Leak
Complexity
Trivial
Reliability
Reliable
Target: Windows Recovery Environment (WinRE) on various Windows versions
Auth required
Prerequisites: Administrative privileges to run reagentc and DISM commands
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (1)

Core 1
Core References

Scores

CVSS v3 6.6
EPSS 0.0310
EPSS Percentile 86.0%
Attack Vector PHYSICAL
CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

VulnCheck KEV 2025-04-03
CWE
CWE-20
Status published
Products (11)
microsoft/windows_10_1507 < 10.0.10240.20402 (2 CPE variants)
microsoft/windows_10_1607 < 10.0.14393.6614 (2 CPE variants)
microsoft/windows_10_1809 < 10.0.17763.5329
microsoft/windows_10_21h2 < 10.0.19044.3930
microsoft/windows_10_22h2 < 10.0.19045.3930
microsoft/windows_11_21h2 < 10.0.22000.2713 (2 CPE variants)
microsoft/windows_11_22h2 < 10.0.22621.3007 (2 CPE variants)
microsoft/windows_11_23h2 < 10.0.22631.3007 (2 CPE variants)
microsoft/windows_server_2016
microsoft/windows_server_2019
... and 1 more
Published Jan 09, 2024
Tracked Since Feb 18, 2026