What is CVE-2025-29971?

CVE-2025-29971 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Web Threat Defense (WTD.sys) Denial of Service Vulnerability

Which CVE IDs does CVE-2025-29971 cover?

CVE-2025-29971 covers the following CVE IDs: CVE-2025-29971. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2025-29971?

CVE-2025-29971 has a CVSS v3 base score of 7.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2025-29971?

CVE-2025-29971 affects 6 products, including: Windows 11 Version 22H2 for ARM64-based Systems; Windows 11 Version 22H2 for x64-based Systems; Windows 11 Version 23H2 for ARM64-based Systems; Windows 11 Version 23H2 for x64-based Systems; Windows 11 Version 24H2 for ARM64-based Systems; and others — see the full list on the advisory page.

CVE-2025-29971HighCVSS 7.5

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

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2025-29971 →

📋 Description

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

🎯 Affected products6

Windows 11 Version 22H2 for ARM64-based Systems
Windows 11 Version 22H2 for x64-based Systems
Windows 11 Version 23H2 for ARM64-based Systems
Windows 11 Version 23H2 for x64-based Systems
Windows 11 Version 24H2 for ARM64-based Systems
Windows 11 Version 24H2 for x64-based Systems

✅ Remediation

KB5058405 (Security Update) — fixed build 10.0.22621.5335 KB5058405 (Security Update) — fixed build 10.0.22631.5335 KB5058411 (Security Update) — fixed build 10.0.26100.4061 KB5061258 (Security HotPatch Update) — fixed build 10.0.26100.3983

🔗 References (7)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29971
patchhttps://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5058405
referencehttps://support.microsoft.com/help/5058405
patchhttps://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5058411
referencehttps://support.microsoft.com/help/5058411
patchhttps://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5061258
referencehttps://support.microsoft.com/help/5061258