# CERT-FR Warns of .NET Privilege Escalation Flaws

Published: 2026-10-26 · Severity: elevated
Canonical: https://vorant.io/reports/261f6803-221b-550d-910a-1b6d4c3db2db/cert-fr-warns-of-net-privilege-escalation-flaws

> CERT-FR advisory details two privilege-escalation vulnerabilities in Microsoft .NET versions 8, 9, 10 and 11 across Windows, Linux and macOS; patches available.

CERT-FR has issued an advisory covering two vulnerabilities (CVE-2026-111497 and CVE-2026-114148) affecting multiple versions of Microsoft .NET. The flaws impact .NET 8.0, 9.0, 10.0 and 11.0 on Windows, Linux, and macOS, as well as .NET source-build Linux tarballs and ASP.NET Core runtime/targeting-pack Linux tarballs. Successful exploitation allows an attacker to achieve privilege escalation on affected systems.

Affected version thresholds include .NET 8.0 prior to 8.0.427, .NET 9.0 prior to 9.0.320, .NET 10.0 prior to 10.0.403, and .NET 11.0 prior to various 11.0.100-rc.3 builds, along with related source-build and ASP.NET Core tarball packages. No indication is given that these vulnerabilities are being exploited in the wild; this is a standard vendor-disclosed vulnerability advisory. Defenders running affected .NET runtimes should prioritize applying Microsoft's published updates per the referenced MSRC bulletins to remediate the privilege escalation risk.

## Mentioned in this report

- Vulnerabilities: CVE-2026-111497 (templated), CVE-2026-114148

Source reporting: https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1382

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