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

EPSS Score

0.50% (percentile: 41.7%)

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)

• Release Notes
• Release Notes
• Release Notes

Acknowledgments

Anonymous

Revision History

• 2026-09-08: Information published.