Aug 2026: .NET Elevation of Privilege Vulnerability
CVE-2026-62909 Published on August 11, 2026
.NET Elevation of Privilege Vulnerability
Uncaught exception in .NET allows an authorized attacker to elevate privileges locally.
Weakness Type
Unchecked Return Value
The software does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions. Two common programmer assumptions are "this function call can never fail" and "it doesn't matter if this function call fails". If an attacker can force the function to fail or otherwise return a value that is not expected, then the subsequent program logic could lead to a vulnerability, because the software is not in a state that the programmer assumes. For example, if the program calls a function to drop privileges but does not check the return code to ensure that privileges were successfully dropped, then the program will continue to operate with the higher privileges.
Products Associated with CVE-2026-62909
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Affected Versions
Microsoft .NET 10.0:- Version 10.0.0 and below 10.0.11 is affected.
- Version 8.0.0 and below 8.0.30 is affected.
- Version 9.0.0 and below 9.0.19 is affected.
- Version 17.14.0 and below 17.14.38 is affected.
- Version 18.0 and below 18.8.3 is affected.