High MSRC-CVE-2026-69781 1 CVE

Windows DHCP Client Denial of Service Vulnerability

Published Sep 8, 2026 · Updated Sep 8, 2026

Vendor: Microsoft

Summary

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

Details

Security updates
10.0.26100.33438 — https://support.microsoft.com/help/5122871
10.0.26200.9445 — https://support.microsoft.com/help/5124008
10.0.28000.2954 — https://support.microsoft.com/help/5124012

Vulnerabilities 1

Medium 6.5

CVE-2026-69781

Windows DHCP Client Denial of Service Vulnerability

Missing release of memory after effective lifetime in Windows DHCP Client allows an unauthorized attacker to deny service over an adjacent network.

Microsoft Windows Server 2025 Windows Server 2025 (Server Core installation) Windows 11 Version 24H2 Windows

Sep 8, 2026

Revision history

2026-09-08 #1
Information published.

References

CVE-2026-69781 Windows DHCP Client Denial of Service Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69781
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