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 this vulnerability?
An attacker who successfully exploited this vulnerability could overwrite arbitrary file content in the security context of the local system.
According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?
Exploitation of this vulnerability requires that a user trigger the payload in the application.
According to the CVSS metric, user interaction is required (UI:R) and privileges required is low (PR:L). What does that mean for this vulnerability?
An authorized attacker with standard user privileges could place a malicious file and then wait for the privileged victim to run the calling command.
Security updates
8.0.12 — https://support.microsoft.com/help/5050525
9.0.1 — https://support.microsoft.com/help/5050526
17.12.4 — https://learn.microsoft.com/en-us/visualstudio/releases/2022/release-notes
Vulnerabilities 1
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High 7.3
.NET Elevation of Privilege Vulnerability
.NET Elevation of Privilege Vulnerability
Revision history
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#1
Information published.
References
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CVE-2025-21173 .NET Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21173
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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