KEV Entry

CVE-2021-31166

Known Exploited Vulnerability Entry External Catalog

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Entry Details
Confirmed Exploited

CVE-2021-31166

2022-04-06 00:00 UTC

Timestamps

2022-04-06

2022-04-06

Scope

KEVIntel entry: HTTP Protocol Stack Remote Code Execution Vulnerability | Affected: Microsoft / Windows 10 Version 2004, Windows Server version 2004, Windows 10 Version 20H2, Windows Server version 20H2 | CVSS: 9.8 (CRITICAL) | Used in malware: unknown | Not yet in CISA KEV: False

References
  • {'id': 'CVE-2021-31166', 'url': 'https://www.cve.org/CVERecord?id=CVE-2021-31166'}
  • {'id': 'kevintel', 'url': 'https://kevintel.com/vuln/CVE-2021-31166'}

c1c8f8ef-2bd0-487e-afaf-eb3a159bcc53

caeb2787-0d58-4236-9039-7c86c3e566f3

2026-06-23 14:05 UTC

2026-06-23 14:05 UTC

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
public_report kevintel successful_exploitation 0.70
View details 
{
  "added_date": "2022-04-06T00:00:00.000Z",
  "ahead_of_cisa_kev": null,
  "cvss_score": 9.8,
  "cvss_severity": "CRITICAL",
  "epss_percentile": null,
  "epss_score": null,
  "feed": "KEVIntel (kevintel.com)",
  "not_yet_in_cisa_kev": false,
  "product": "Windows 10 Version 2004, Windows Server version 2004, Windows 10 Version 20H2, Windows Server version 20H2",
  "title": "HTTP Protocol Stack Remote Code Execution Vulnerability",
  "used_in_malware": "unknown",
  "vendor": "Microsoft"
}
 -
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