Summary
Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
What privileges could be gained by an attacker who successfully exploited the vulnerability?
An attacker would only be able to delete targeted files on a system. They would not gain privileges to view or modify file contents.
Security updates
10.0.17763.2061 — https://support.microsoft.com/help/5004244
10.0.18363.1679 — https://support.microsoft.com/help/5004245
10.0.19043.1110 — https://support.microsoft.com/help/5004237
Vulnerabilities 1
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Medium 6.1
Windows InstallService Elevation of Privilege Vulnerability
Windows InstallService Elevation of Privilege Vulnerability
Revision history
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#1
Information published.
References
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CVE-2021-31961 Windows InstallService Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31961
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss