Description
Exposure of sensitive information to an unauthorized actor in .NET allows an authorized attacker to elevate privileges locally.
Published: 2026-09-08
Score: 7 High
EPSS: < 1% Very Low
KEV: No
Impact: Local Privilege Escalation
Action: Apply Patch
AI Analysis

Impact

Microsoft .NET and Visual Studio expose sensitive configuration information. An attacker with legitimate access can read this data, and because the flaw provides a way to misuse it as a low‑overhead local privilege escalation vector, the attacker can elevate their privilege level on the host system. The issue is categorized under CWE‑200 (Information Exposure) and CWE‑94 (Improper Control of Generation of Code via Untrusted Input), indicating that the information disclosure and potential misuse of code execution paths are the root causes. As a result, the attacker can potentially gain administrative rights on the system running the affected .NET runtime or Visual Studio.

Affected Systems

Microsoft .NET 9.0, 10.0, and 11.0 as well as Microsoft Visual Studio 2022 version 17.14 and Visual Studio 2026 version 18.9 are impacted by this CVE. The affected versions are those explicitly listed in the vendor product references; no further narrowing of sub‑versions is provided.

Risk and Exploitability

The CVSS score of 7 indicates a medium‑to‑high severity, and the EPSS score is <1%, indicating a low probability of exploitation. The vulnerability is not listed in the CISA KEV catalog. The likely attack vector is local – it requires an authorized attacker with existing access to the affected environment to exploit the information disclosure. Once exploited, the attacker can gain significant administrative control over the affected system, posing a substantial risk to resources running the impacted .NET components.

Generated by OpenCVE AI on October 1, 2026 at 21:42 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the Microsoft security update released for CVE-2026-69806 to all installed .NET runtimes and Visual Studio editions mentioned.
  • Review and refactor any code that constructs dynamic code or uses format strings to ensure proper sanitization, addressing the CWE‑94 aspect of the flaw.
  • Enforce least privilege for processes and accounts interacting with .NET components and restrict access to sensitive configuration data to mitigate potential privilege escalation.

Generated by OpenCVE AI on October 1, 2026 at 21:42 UTC.

Tracking

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Advisories
Source ID Title
Ubuntu USN Ubuntu USN USN-8740-1 .NET vulnerabilities
History

Tue, 29 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:a:microsoft:.net:11.0.0:preview1:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net:11.0.0:preview2:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net:11.0.0:preview3:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net:11.0.0:preview4:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net:11.0.0:preview5:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net:11.0.0:preview7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel

Thu, 10 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 09 Sep 2026 00:15:00 +0000


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

Type Values Removed Values Added
Description Exposure of sensitive information to an unauthorized actor in .NET allows an authorized attacker to elevate privileges locally.
Title .NET Elevation of Privilege Vulnerability
First Time appeared Microsoft
Microsoft .net
Microsoft visual Studio 2022
Microsoft visual Studio 2026
Weaknesses CWE-200
CWE-94
CPEs cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft .net
Microsoft visual Studio 2022
Microsoft visual Studio 2026
References
Metrics cvssV3_1

{'score': 7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}


Subscriptions

Linux Linux Kernel
Microsoft .net Visual Studio 2022 Visual Studio 2026
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-10-14T23:14:52.830Z

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

Link: CVE-2026-69806

cve-icon Vulnrichment

Updated: 2026-09-10T18:26:12.135Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-08T18:19:52.190

Modified: 2026-09-29T14:16:46.390

Link: CVE-2026-69806

cve-icon Redhat

Severity : Important

Publid Date: 2026-09-08T17:00:00Z

Links: CVE-2026-69806 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-01T21:45:06Z

Weaknesses
  • CWE-200

    Exposure of Sensitive Information to an Unauthorized Actor

  • CWE-94

    Improper Control of Generation of Code ('Code Injection')