# CVE-2022-21907

HTTP Protocol Stack Remote Code Execution Vulnerability

- Page: https://www.vulneraibility.com/cve/CVE-2022-21907
- CVSS: 9.8
- Known exploited: not in CISA KEV as of our last sync
- EPSS: 92.79% (percentile 99.8)
- Public exploit code: 1 on Exploit-DB · 16 GitHub proofs of concept (first 2022-01-11)
- CISA SSVC: exploitation none, automatable yes, technical impact total (assessed 2024-11-19)
- Published: 2022-01-11

## Affected versions

- Microsoft Windows 10 Version 1809: affected >= 10.0.17763.0 and < 10.0.17763.2452; >= 10.0.0 and < 10.0.17763.2452
- Microsoft Windows 10 Version 20H2: affected >= 10.0.0 and < 10.0.19042.1466
- Microsoft Windows 10 Version 21H1: affected >= 10.0.0 and < 10.0.19043.1466
- Microsoft Windows 10 Version 21H2: affected >= 10.0.19043.0 and < 10.0.19044.1466
- Microsoft Windows 11 version 21H2: affected >= 10.0.0 and < 10.0.22000.434
- Microsoft Windows Server 2019: affected >= 10.0.17763.0 and < 10.0.17763.2452
- Microsoft Windows Server 2019 (Server Core installation): affected >= 10.0.17763.0 and < 10.0.17763.2452
- Microsoft Windows Server 2022: affected >= 10.0.20348.0 and < 10.0.20348.469
- Microsoft Windows Server version 20H2: affected >= 10.0.0 and < 10.0.19042.1466

A version outside these ranges is not a statement that it is unaffected.

## References

- [advisory] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21907
- [other] https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-21907
- [other] http://packetstormsecurity.com/files/166730/Microsoft-HTTP-Protocol-Stack-Denial-Of-Service.html

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.