CVE-2021-43226CISA KEVEPSS p87.3%

CVE-2021-43226Microsoft Windows Privilege Escalation Vulnerability

Microsoft / Windows

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.

Scoring

CVSS 7.8 ()
VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS3.10% probability of exploitation · percentile 87.3% · 2026-10-05T12:00:23Z
Last modified2026-08-22

CISA KEV entry

Added to KEV: 2025-10-06

(incoming)1

TypeTargetConfidenceTier
KEVEntryMicrosoft Windows Privilege Escalation Vulnerabilitykev-cve-2021-432260%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
Microsoft Windows CLFS Driver Privilege Escalation Vulnerability
CVE
Microsoft Windows Common Log File System (CLFS) Driver Privilege Escalation Vulnerability
CVE
CVE-2026-40397
CVE
Microsoft Windows Privilege Common Log File System (CLFS) Escalation Vulnerability
CVE
Microsoft Windows Common Log File System (CLFS) Driver Use-After-Free Vulnerability
CVE
Microsoft Windows Common Log File System (CLFS) Driver Heap-Based Buffer Overflow Vulnerability
Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.