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CVE-2021-38634high

Microsoft Windows Update Client Elevation of Privilege Vulnerability

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.1epss 0.8%
exploitation probability
0.8%top 46% of all CVEs
observed exploitation
nono source reports it
Microsoft Windows Update Client Elevation of Privilege Vulnerability
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H/E:U/RL:O/RC:C
Affected products
Microsoft · Windows 10 Version 1507Microsoft · Windows 10 Version 1607Microsoft · Windows 10 Version 1809Microsoft · Windows 10 Version 1909Microsoft · Windows 10 Version 2004Microsoft · Windows 10 Version 20H2Microsoft · Windows 10 Version 21H1Microsoft · Windows Server 2016Microsoft · Windows Server 2016 (Server Core installation)Microsoft · Windows Server 2019Microsoft · Windows Server 2019 (Server Core installation)Microsoft · Windows Server 2022Microsoft · Windows Server version 2004Microsoft · Windows Server version 20H2
References
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38634https://www.zerodayinitiative.com/advisories/ZDI-21-1075/