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CVE-2021-31166

🔥 Known Exploited (CISA KEV)CRITICAL

9.8

CVSS Severity Score

EPSS Score91.3050%

EPSS Percentile86.02th

Published2021-05-11

Last Modified2025-10-30

Data SourcesNVDCISA KEVFIRST.org EPSS

Vulnerability Description

HTTP Protocol Stack Remote Code Execution Vulnerability

Affected Platforms (CPE)

💻

Microsoft

Windows 10 2004

< 10.0.19041.982

💻

Microsoft

Windows 10 20h2

< 10.0.19042.982

💻

Microsoft

Windows Server 2004

< 10.0.19041.982

💻

Microsoft

Windows Server 20h2

< 10.0.19042.982

References & Advisories

🔗 http://packetstormsecurity.com/files/162722/Microsoft-HTTP-Protocol-Stack-Remote-Code-Execution.html

🔗 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31166

🔗 http://packetstormsecurity.com/files/162722/Microsoft-HTTP-Protocol-Stack-Remote-Code-Execution.html

🔗 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31166

🔗 https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31166

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