CVE-2021-31166CriticalCVSS 9.8

HTTP Protocol Stack Remote Code Execution Vulnerability

Published
May 11, 2021
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2021-31166 →

📋 Description

How could an attacker exploit this vulnerability? In most situations, an unauthenticated attacker could send a specially crafted packet to a targeted server utilizing the HTTP Protocol Stack (http.sys) to process packets. Is this wormable? Yes. Microsoft recommends prioritizing the patching of affected servers.

🎯 Affected products7

  • Windows 10 Version 2004 for 32-bit Systems
  • Windows 10 Version 2004 for ARM64-based Systems
  • Windows 10 Version 2004 for x64-based Systems
  • Windows 10 Version 20H2 for 32-bit Systems
  • Windows 10 Version 20H2 for ARM64-based Systems
  • Windows Server, version 2004 (Server Core installation)
  • Windows Server, version 20H2 (Server Core Installation)

✅ Remediation

KB5003173 (Security Update) — fixed build 10.0.19041.982 KB5003173 (Security Update) — fixed build 10.0.19042.982

🔗 References (3)