CVE-2025-53778

Improper authentication in Windows NTLM allows an authorized attacker to elevate privileges over a network.

Score

CVSS 3.1 8.8 High

Status

Modified - secure@microsoft.com

Published

2025-08-12

Last modified

2026-02-26

Weaknesses

CWE-287

Affected products

• Windows 10 1507 (Microsoft)
• Windows 10 1607 (Microsoft)
• Windows 10 1809 (Microsoft)
• Windows 10 21H2 (Microsoft)
• Windows 10 21h2 (Microsoft)
• Windows 10 22H2 (Microsoft)
• Windows 10 22h2 (Microsoft)
• Windows 11 22H2 (Microsoft)
• Windows 11 22h2 (Microsoft)
• Windows 11 23H2 (Microsoft)
• Windows 11 23h2 (Microsoft)
• Windows 11 24H2 (Microsoft)
• Windows 11 24h2 (Microsoft)
• Windows Server 2008 (Microsoft)
• Windows Server 2008 R2 (Microsoft)
• Windows Server 2008 Sp2 (Microsoft)
• Windows Server 2012 (Microsoft)
• Windows Server 2012 R2 (Microsoft)
• Windows Server 2016 (Microsoft)
• Windows Server 2019 (Microsoft)
• Windows Server 2022 (Microsoft)
• Windows Server 2022 23h2 (Microsoft)
• Windows Server 2025 (Microsoft)
• Windows Server 23h2 (Microsoft)

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53778
• https://www.vicarius.io/vsociety/posts/cve-2025-53778-detection-script-improper-authentication-vulnerability-affecting-…
• https://www.vicarius.io/vsociety/posts/cve-2025-53778-mitigation-script-improper-authentication-vulnerability-affecting…