Description
External control of file name or path in .NET allows an unauthorized attacker to elevate privileges over a network.
Published: 2026-09-08
Score: 7.5 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The vulnerability arises when an attacker can externally control a file name or path used by a .NET component. By supplying a malicious path, an unauthorized user can elevate their privileges over the network, potentially gaining higher access rights or executing code with elevated permissions. This flaw is rooted in improper validation of file paths (CWE-200, CWE-522, CWE-73).

Affected Systems

Affected products include Microsoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.9, and Microsoft Diagnostics Runtime. All identified versions are impacted; patching to the latest released versions is recommended.

Risk and Exploitability

The CVSS score of 7.5 indicates a high potential impact if exploited. EPSS is not available and the vulnerability is not listed in CISA’s KEV catalog, so current exploitation probability is unknown. The likely attack vector is remote over a network, where an attacker supplies a crafted file name or path to elevate privileges, as inferred from the description. Early remediation is advised to mitigate potential privilege escalation.

Generated by OpenCVE AI on September 8, 2026 at 23:33 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Install the latest Microsoft security update for Visual Studio 2022 version 17.14, Visual Studio 2026 version 18.9, and Microsoft Diagnostics Runtime components, as detailed in the Microsoft Security Response Center advisory for CVE‑2026‑69805.
  • Apply the official patch contained in the Microsoft update guidance for this CVE, ensuring all affected .NET assemblies are updated to the fixed release.
  • If an immediate patch is not feasible, restrict processing of file names and paths to validated, whitelisted values in all .NET applications until the update is applied.

Generated by OpenCVE AI on September 8, 2026 at 23:33 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Tue, 08 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Description External control of file name or path in .NET allows an unauthorized attacker to elevate privileges over a network.
Title .NET Elevation of Privilege Vulnerability
First Time appeared Microsoft
Microsoft diagnostics Runtime
Microsoft visual Studio 2022
Microsoft visual Studio 2026
Weaknesses CWE-200
CWE-522
CWE-73
CPEs cpe:2.3:a:microsoft:diagnostics_runtime:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft diagnostics Runtime
Microsoft visual Studio 2022
Microsoft visual Studio 2026
References
Metrics cvssV3_1

{'score': 7.5, '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'}

Subscriptions

Microsoft Diagnostics Runtime Visual Studio 2022 Visual Studio 2026
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-09-08T23:40:40.428Z

Reserved: 2026-08-03T22:47:19.710Z

Link: CVE-2026-69805

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-08T18:19:52.063

Modified: 2026-09-08T18:39:51.493

Link: CVE-2026-69805

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-08T23:45:03Z

Weaknesses
  • CWE-200

    Exposure of Sensitive Information to an Unauthorized Actor

  • CWE-522

    Insufficiently Protected Credentials

  • CWE-73

    External Control of File Name or Path