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CVE-2026-121680ImportantMonitor

Windows NTLM Spoofing Vulnerability

Severity Important  ·  Urgency Monitor

Why it matters: Important severity (CVSS 7.5)

Spoofing · Important · CVSS 7.5. Affects: Microsoft Office for Android, Windows 10 Version, Windows Server, Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems.

CVSS 7.5EPSS 1.0%Security update published 2026-11-13Applies to On-premisesNVD

Affected: Microsoft Office for Android, Windows 10 Version, Windows Server, Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems

Related changes

Change history

2026-11-13 · First captured by tracker

View at Microsoft →