Vulnerability Monitor

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CVE-2021-31166

HTTP Protocol Stack Remote Code Execution Vulnerability

Published

2021-05-11T19:15:09.300

Last Modified

2025-10-22T00:17:35.357

Status

Undergoing Analysis

Source

[email protected]

Severity

CVSSv3.1: 9.8 (CRITICAL)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

6.4

Weaknesses

Type: Primary
CWE-416
Type: Secondary
CWE-416

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	microsoft	windows_10_2004	< 10.0.19041.982	Yes
Operating System	microsoft	windows_10_20h2	< 10.0.19042.982	Yes
Operating System	microsoft	windows_server_2004	< 10.0.19041.982	Yes
Operating System	microsoft	windows_server_20h2	< 10.0.19042.982	Yes

References

http://packetstormsecurity.com/files/162722/Microsoft-HTTP-Protocol-Stack-Remote-Code-Execution.html Third Party Advisory, VDB Entry ([email protected])
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31166 Patch, Vendor Advisory ([email protected])
http://packetstormsecurity.com/files/162722/Microsoft-HTTP-Protocol-Stack-Remote-Code-Execution.html Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31166 Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31166 (134c704f-9b21-4f2e-91b3-4a467353bcc0)