VulnerabilityModified
CVE-2021-38634
Microsoft Windows Update Client Elevation of Privilege Vulnerability
HIGH 7.1EPSS 0.86%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.86%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Microsoft Windows Update Client Elevation of Privilege Vulnerability
- CVSS 3.1
- 7.1 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
- EPSS
- 0.86% probability · 57th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-269
- Affected
- microsoft/windows 10 · microsoft/windows server 2016 · microsoft/windows server 2019 · microsoft/windows server 2022
- Source
- secure@microsoft.com
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38634
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38634Patch, Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-1075/Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.