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CVE-2026-69806ImportantRevised 25 Sep

.NET Elevation of Privilege Vulnerability

MSRC advisory NVD CVE.org

Assessment

Exposure of sensitive information to an unauthorized actor in .NET allows an authorized attacker to elevate privileges locally.

Severity
Important
CVSS base score
7.0CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Impact
Elevation of Privilege
EPSS, next 30 days
1.9%Higher than 78.5% of scored CVEs · FIRST model run 26 Sep 2026 · about EPSS
Exploitability
Exploitation Less Likely
Publicly disclosed
No
Customer action
Required: apply the update
Component
.NET
Weakness
CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Issued by
Microsoft
Published
8 Sep 2026 · September 2026
Last revised
25 Sep 2026Security Updates table updated provide links to the KB articles and download center updates. Microsoft recommends installing the updates.

Updates that fix it

2 KBs
KBTypeRestartApplies toOther CVEs
KB5126105 Security Update — .NET 9.0 installed on Linux All CVEs in KB5126105
KB5126106 Security Update — .NET 10.0 installed on Linux All CVEs in KB5126106

Affected products

Developer Tools
5 affected products
  • .NET 10.0 installed on Linux
  • .NET 11.0 installed on Linux
  • .NET 9.0 installed on Linux
  • Microsoft Visual Studio 2022 version 17.14
  • Microsoft Visual Studio 2026 version 18.9
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