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CVE-2021-31166
CRITICALCISA KEV9.8
Description
HTTP Protocol Stack Remote Code Execution Vulnerability
CVE Details
CVSS v3.1 Score9.8
SeverityCRITICAL
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack VectorNETWORK
ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
Published5/11/2021
Last Modified10/30/2025
Sourcekev
Honeypot Sightings0
CISA KEV
VendorMicrosoft
ProductHTTP Protocol Stack
Vulnerability NameMicrosoft HTTP Protocol Stack Remote Code Execution Vulnerability
KEV Date Added2022-04-06
Remediation Due Date2022-04-27
Ransomware UseUnknown
Affected Products
microsoft:windows_10_2004microsoft:windows_10_20h2microsoft:windows_server_2004microsoft:windows_server_20h2
Weaknesses (CWE)
CWE-416CWE-416
References
http://packetstormsecurity.com/files/162722/Microsoft-HTTP-Protocol-Stack-Remote-Code-Execution.html(secure@microsoft.com)
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31166(secure@microsoft.com)
http://packetstormsecurity.com/files/162722/Microsoft-HTTP-Protocol-Stack-Remote-Code-Execution.html(af854a3a-2127-422b-91ae-364da2661108)
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31166(af854a3a-2127-422b-91ae-364da2661108)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31166(134c704f-9b21-4f2e-91b3-4a467353bcc0)
IOC Correlations
No correlations recorded
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