CVE-2026-83855HighCVSS 7.5

Windows WLAN Service Denial of Service Vulnerability

Published
October 13, 2026
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2026-83855 →

📋 Description

Integer underflow (wrap or wraparound) in Windows WLAN Service allows an unauthorized attacker to deny service over a network.

🎯 Affected products12

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

✅ Remediation

KB5126646 (Security Update) — fixed build 10.0.26100.33650 KB5127648 (Security Update) — fixed build 10.0.26200.9711 KB5126653 (Security Update) — fixed build 10.0.22631.7652 KB5127648 (Security Update) — fixed build 10.0.26100.9711 KB5127646 (Security Update) — fixed build 10.0.28000.3231 KB5127648 (Security Update) — fixed build 10.0.26300.9711

🔗 References (9)