High MSRC-CVE-2025-29971 1 CVE

Web Threat Defense (WTD.sys) Denial of Service Vulnerability

Published May 13, 2025 · Updated May 16, 2025 · Revision 2

Vendor: Microsoft

Summary

Impact: Denial of Service. Microsoft rating: Important. Not known to be exploited — Exploitation More Likely. Customer action: Required.

Details

Security updates
10.0.22621.5335 — https://support.microsoft.com/help/5058405
10.0.26100.4061 — https://support.microsoft.com/help/5058411
10.0.26100.3983 — https://support.microsoft.com/help/5061258

Vulnerabilities 1

High 7.5

CVE-2025-29971 EPSS 68%

Web Threat Defense (WTD.sys) Denial of Service Vulnerability

Out-of-bounds read in Web Threat Defense (WTD.sys) allows an unauthorized attacker to deny service over a network.

Microsoft Windows 11 Version 24H2 Windows 11 version 23H2 Windows 11 version 22H2 Windows

May 13, 2025

Revision history

2025-05-16 #2
To comprehensively address CVE-2025-29971, Microsoft has released HotPatch KB5061258 for Windows 11 Version 24H2 for x64-based Systems and Windows 11 Version 24H2 for ARM64-based Systems. Customers running these versions of Windows and who install the HotPatch updates should install KB5061258 to be protected from this vulnerability.
2025-05-13 #1
Information published.

References

CVE-2025-29971 Web Threat Defense (WTD.sys) Denial of Service Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29971
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss