Dashboard / CVE-2021-43226

CVE-2021-43226

CISA KEV RANSOMWARE
ACT NOW Priority: 0.00 BB Relevance: 0/100
Published: N/A Modified: N/A First seen: 2026-10-29 Status: pending_score

Description

Microsoft Windows Common Log File System Driver contains a privilege escalation vulnerability that could allow a local, privileged attacker to bypass certain security mechanisms.

CISA Known Exploited Vulnerability

Vendor / Product Microsoft — Windows
Date Added 2025-10-06
Remediation Due 2025-10-27
Ransomware Use CONFIRMED
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-43226 ; https://nvd.nist.gov/vuln/detail/CVE-2021-43226

Affected Software (25)

VendorProductVersion
microsoft windows_10_1507 < 10.0.10240.19145
microsoft windows_10_1507 < 10.0.10240.19145
microsoft windows_10_1607 < 10.0.14393.4825
microsoft windows_10_1607 < 10.0.14393.4825
microsoft windows_10_1809 < 10.0.17763.2366
microsoft windows_10_1909 < 10.0.18363.1977
microsoft windows_10_2004 < 10.0.19041.1415
microsoft windows_10_20h2 < 10.0.19042.1415
microsoft windows_10_20h2 < 10.0.19042.1415
microsoft windows_10_21h1 < 10.0.19043.1415
microsoft windows_10_21h2 < 10.0.19044.1415
microsoft windows_11_21h2 < 10.0.22000.376
microsoft windows_7 -
microsoft windows_8.1 -
microsoft windows_rt_8.1 -
microsoft windows_server_2004 < 10.0.19041.1415
microsoft windows_server_2008 -
microsoft windows_server_2008 -
microsoft windows_server_2008 r2
microsoft windows_server_2012 -
microsoft windows_server_2012 r2
microsoft windows_server_2016 < 10.0.14393.4825
microsoft windows_server_2019 < 10.0.17763.2366
microsoft windows_server_2022 < 10.0.20348.405
microsoft windows_server_20h2 < 10.0.19042.1415

References & Advisories (2)

Bug Bounty Relevance

0 / 100
✓ Known exploited (KEV)

CVSS Score

Unscored

EPSS — Exploitation Probability

No EPSS data available

Intelligence Sources

kev ref →

External Links