# CVE-2021-36948

Windows Update Medic Service Elevation of Privilege Vulnerability

- Page: https://www.vulneraibility.com/cve/CVE-2021-36948
- CVSS: 7.8
- Known exploited: yes, in CISA KEV since 2021-11-03; CISA due date 2021-11-17
- EPSS: 23.27% (percentile 97.8)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2025-02-04)
- Published: 2021-08-12

## Affected versions

- Microsoft Windows 10 Version 1809: affected >= 10.0.17763.0 and < 10.0.17763.2114; >= 10.0.0 and < 10.0.17763.2114
- Microsoft Windows 10 Version 1909: affected >= 10.0.0 and < 10.0.18363.1734
- Microsoft Windows 10 Version 2004: affected >= 10.0.0 and < 10.0.19041.1165
- Microsoft Windows 10 Version 20H2: affected >= 10.0.0 and < 10.0.19042.1165
- Microsoft Windows 10 Version 21H1: affected >= 10.0.0 and < 10.0.19043.1165
- Microsoft Windows Server 2019: affected >= 10.0.17763.0 and < 10.0.17763.2114
- Microsoft Windows Server 2019 (Server Core installation): affected >= 10.0.17763.0 and < 10.0.17763.2114
- Microsoft Windows Server version 2004: affected >= 10.0.0 and < 10.0.19041.1165
- Microsoft Windows Server version 20H2: affected >= 10.0.0 and < 10.0.19042.1165

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

## References

- [patch] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36948
- [other] https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36948
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-36948

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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.