What is CVE-2026-69781?

CVE-2026-69781 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Windows DHCP Client Denial of Service Vulnerability

Which CVE IDs does CVE-2026-69781 cover?

CVE-2026-69781 covers the following CVE IDs: CVE-2026-69781. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-69781?

CVE-2026-69781 has a CVSS v3 base score of 6.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-69781?

CVE-2026-69781 affects 8 products, including: Windows 11 Version 24H2 for ARM64-based Systems; Windows 11 Version 24H2 for x64-based Systems; Windows 11 Version 25H2 for ARM64-based Systems; Windows 11 Version 25H2 for x64-based Systems; Windows 11 Version 26H1 for ARM64-based Systems; and others — see the full list on the advisory page.

CVE-2026-69781HighCVSS 6.5

Windows DHCP Client Denial of Service Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

September 11, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-69781 →

📋 Description

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

🎯 Affected products8

Windows 11 Version 24H2 for ARM64-based Systems
Windows 11 Version 24H2 for x64-based Systems
Windows 11 Version 25H2 for ARM64-based Systems
Windows 11 Version 25H2 for x64-based Systems
Windows 11 Version 26H1 for ARM64-based Systems
Windows 11 version 26H1 for x64-based Systems
Windows Server 2025
Windows Server 2025 (Server Core installation)

✅ Remediation

KB5122871 (Security Update) — fixed build 10.0.26100.33438 KB5124008 (Security Update) — fixed build 10.0.26200.9445 KB5124008 (Security Update) — fixed build 10.0.26100.9445 KB5124012 (Security Update) — fixed build 10.0.28000.2954

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products8

✅ Remediation

🔗 References (7)