Summary
Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. Customer action: Required.
Details
How could an attacker exploit this vulnerability?
An attacker could exploit this vulnerability by convincing a user or service to process a specially crafted Portable PDB file. Successful exploitation could allow the attacker to execute code with the privileges of the affected process.
What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain the privileges of the user account or service account running the affected process.
Security updates
10.0.12 — https://support.microsoft.com/kb/5126106
8.0.31 — https://support.microsoft.com/kb/5126104
9.0.20 — https://support.microsoft.com/kb/5126105
17.14.40 — https://learn.microsoft.com/en-us/visualstudio/releases/2022/release-notes
18.9.3 — https://learn.microsoft.com/en-us/visualstudio/releases/2026/release-notes
Vulnerabilities 1
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High 8.8
.NET and Visual Studio Elevation of Privilege Vulnerability
Heap-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.
Revision history
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#2
Security Updates table updated provide links to the KB articles and download center updates. Microsoft recommends installing the updates.
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#1
Information published.
References
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CVE-2026-69439 .NET and Visual Studio Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69439
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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