VULNERABILITY INTELLIGENCE
CVE-2021-31166
CVSS score9.8 CRITICAL
EPSS probability99.87%
CISA KEVKnown exploited vulnerability
Published2021-05-11
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Known Exploited Vulnerability
Microsoft HTTP Protocol Stack Remote Code Execution Vulnerability
Vendor / product: Microsoft / HTTP Protocol Stack
Description
HTTP Protocol Stack Remote Code Execution Vulnerability
Weakness classification
- nvd@nist.gov: CWE-416
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-416
Primary references
- secure@microsoft.com — Third Party Advisory, VDB Entry
- secure@microsoft.com — Patch, Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, VDB Entry
- af854a3a-2127-422b-91ae-364da2661108 — Patch, Vendor Advisory
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 — US Government Resource