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Medium5.1Microsoft Server

Medium [CVE-2025-26644] Windows Hello Spoofing Vulnerability

This medium-severity Microsoft Server advisory covers CVE-2025-26644 affecting Windows Server 2019 (Server Core installation), Windows Server 2025 (Server Core installation).

CVE-2025-26644 Published Apr 8, 2025Updated by vendor Aug 10, 2026
CVE-2025-26644
Affected products & platforms
Microsoft ServerWindows Server
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Summary

Automated recognition mechanism with inadequate detection or handling of adversarial input perturbations in Windows Hello allows an unauthorized attacker to perform spoofing locally.

Affected products named by the advisory: Windows Server 2019; Windows Server 2019 (Server Core installation); Windows Server 2025; Windows Server 2025 (Server Core installation).

Affected versions
  • Windows 10 Version 1809 10.0.17763.0 before 10.0.17763.7136
  • Windows 10 Version 21H2 10.0.19044.0 before 10.0.19044.5737
  • Windows 10 Version 22H2 10.0.19045.0 before 10.0.19045.5737
  • Windows 11 version 22H2 10.0.22621.0 before 10.0.22621.5189
  • Windows 11 version 22H3 10.0.22631.0 before 10.0.22631.5189
  • Windows 11 Version 23H2 10.0.22631.0 before 10.0.22631.5189
  • Windows 11 Version 24H2 10.0.26100.0 before 10.0.26100.3775
  • Windows Server 2019 10.0.17763.0 before 10.0.17763.7136
  • Windows Server 2019 (Server Core installation) 10.0.17763.0 before 10.0.17763.7136
  • Windows Server 2025 10.0.26100.0 before 10.0.26100.3775
  • Windows Server 2025 (Server Core installation) 10.0.26100.0 before 10.0.26100.3775

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Fixed versions
  • 10.0.17763.7136
  • 10.0.19044.5737
  • 10.0.19045.5737
  • 10.0.22621.5189
  • 10.0.22631.5189
  • 10.0.26100.3775

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Mitigation

Upgrade to a fixed release: 10.0.17763.7136, 10.0.19044.5737, 10.0.19045.5737, 10.0.22621.5189, 10.0.22631.5189, 10.0.26100.3775. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Discussion(0)

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