---
id: CVE-2026-69805
title: >-
  External control of file name or path in .NET allows an unauthorized attacker
  to elevate privileges over a network.
summary: >-
  External control of file name or path in .NET allows an unauthorized attacker
  to elevate privileges over a network.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-73
  - CWE-200
  - CWE-522
vendor: microsoft
product: microsoft.diagnostics.runtime
affected:
  - microsoft.diagnostics.runtime < 4.1.740301
  - 'visual_studio_2022 >= 17.14.0, < 17.14.40'
  - 'visual_studio_2026 >= 18.9.0, < 18.9.3'
patched:
  - microsoft.diagnostics.runtime 4.1.740301
  - visual_studio_2022 17.14.40
  - visual_studio_2026 18.9.3
published: '2026-09-08'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T19:54:00.403'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-69805'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69805'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-09T04:18:29.981672Z'
epss: 0.00496
epssPercentile: 0.42364
ingestedAt: '2026-09-08T19:08:49.620Z'
---

## Overview

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

## Affected

- `microsoft.diagnostics.runtime < 4.1.740301`
- `visual_studio_2022 >= 17.14.0, < 17.14.40`
- `visual_studio_2026 >= 18.9.0, < 18.9.3`

## Remediation

Upgrade past the affected range:

- `microsoft.diagnostics.runtime 4.1.740301`
- `visual_studio_2022 17.14.40`
- `visual_studio_2026 18.9.3`