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 who successfully exploited this vulnerability could gain the privileges of the authenticated user.
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 authenticated attacker could place a malicious file in the core project path and then wait for a user with admin privileges to create or build a .NET project to gain elevated privileges.
Security updates
8.0.21 — https://support.microsoft.com/help/5068331
9.0.10 — https://support.microsoft.com/help/5068332
Vulnerabilities 1
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High 7.3
.NET Elevation of Privilege Vulnerability
Improper link resolution before file access ('link following') in .NET allows an authorized attacker to elevate privileges locally.
Revision history
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#1
Information published.
References
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CVE-2025-55247 .NET Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55247
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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