CVE-2026-69805: .NET Elevation of Privilege Vulnerability

Overview

Severity
High (CVSS 7.5)
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Category
Elevation of Privilege
Exploit Status
Not Exploited
Exploitation Likelihood
Less Likely
Patch Tuesday
2026-Sep
Released
2026-09-08

Description

External control of file name or path in .NET allows an unauthorized attacker to elevate privileges over a network.

FAQ

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. According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability? Successful exploitation of this vulnerability requires an attacker to win a race condition.

Affected Products (3)

Developer Tools

  • Microsoft Visual Studio 2022 version 17.14
  • Microsoft Visual Studio 2026 version 18.9

Open Source Software

  • Microsoft.Diagnostics.Runtime

Security Updates (3)

Acknowledgments

Anonymous

Revision History

  • 2026-09-08: Information published.