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EXPOSURES › CVE-2021-43226

CVE-2021-43226

HIGH ⌖ ON CISA KEV · EXPLOITED
DETAIL
SourceCISA-KEV · kev Published2025-10-06 Referencehttps://nvd.nist.gov/vuln/detail/CVE-2021-43226 ↗
⚡ RCE ⌖ EXPLOITED IN THE WILD SHAME 72/100 exploited-in-wildunpatched

Microsoft Windows exploited for privilege escalation locally without patch

A critical Windows vulnerability was actively exploited by attackers, allowing local, privileged users to elevate their access, posing a significant security risk to DIB organizations.

Shame score — Active exploitation of a critical, unpatched vulnerability in widely used Microsoft Windows software by attackers, leading to potential unauthorized access and system compromise.

▸ RECOMMENDED ACTION  Actively exploited (CISA KEV) — remediate now, ahead of your normal patch cycle.

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.

AFFECTED FEDRAMP PRODUCTS · 4
PRODUCTSTATUS
Azure Commercial Cloud
Microsoft
Authorized
Azure Government (includes Dynamics 365)
Microsoft
Authorized
Microsoft Office 365 GCC High
Microsoft
In Process
Office 365 Multi-Tenant & Supporting Services
Microsoft
Authorized