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Windows Hello

CVE-2025-26644 — Windows Hello Spoofing Vulnerability

Important CVSS 5.1 EPSS 0.005 2025-04 archive

Executive Summary

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

Overview

5.1
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Spoofing
Released Apr 8 2025
Last Updated Apr 8 2025
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.005 — 0.38755 percentile
NVD CVSS 5.1 MEDIUM — matches MSRC

CVSS Vector

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C
ATTACK VECTOR
Local
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
None
INTEGRITY
High
AVAILABILITY
None
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 4.5

EPSS Score

0.005
probability of exploitation in the next 30 days
0.38755 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

18 affected products
Product KB Article Severity Impact Restart Required
Windows 10 Version 1809 for 32-bit Systems 5055519 (Security Update) Important Spoofing Yes
Windows 10 Version 1809 for x64-based Systems 5055519 (Security Update) Important Spoofing Yes
Windows 10 Version 21H2 for 32-bit Systems 5055518 (Security Update) Important Spoofing Yes
Windows 10 Version 21H2 for ARM64-based Systems 5055518 (Security Update) Important Spoofing Yes
Windows 10 Version 21H2 for x64-based Systems 5055518 (Security Update) Important Spoofing Yes
Windows 10 Version 22H2 for 32-bit Systems 5055518 (Security Update) Important Spoofing Yes
Windows 10 Version 22H2 for ARM64-based Systems 5055518 (Security Update) Important Spoofing Yes
Windows 10 Version 22H2 for x64-based Systems 5055518 (Security Update) Important Spoofing Yes
Windows 11 Version 22H2 for ARM64-based Systems 5055528 (Security Update) Important Spoofing Yes
Windows 11 Version 22H2 for x64-based Systems 5055528 (Security Update) Important Spoofing Yes
Windows 11 Version 23H2 for ARM64-based Systems 5055528 (Security Update) Important Spoofing Yes
Windows 11 Version 23H2 for x64-based Systems 5055528 (Security Update) Important Spoofing Yes
Windows 11 Version 24H2 for ARM64-based Systems 5055523 (Security Update) Important Spoofing Yes
Windows 11 Version 24H2 for x64-based Systems 5055523 (Security Update) Important Spoofing Yes
Windows Server 2019 5055519 (Security Update) Important Spoofing Yes
Windows Server 2019 (Server Core installation) 5055519 (Security Update) Important Spoofing Yes
Windows Server 2025 5055523 (Security Update) Important Spoofing Yes
Windows Server 2025 (Server Core installation) 5055523 (Security Update) Important Spoofing Yes

Patches

4 patches
Article Type Restart
5055519 Security Update Yes
5055518 Security Update Yes
5055528 Security Update Yes
5055523 Security Update Yes

Known Exploits

On This Page