ASP.NET Core Elevation of Privilege Vulnerability
Published October 25, 2026Updated October 25, 2026
Source data
Overview
Incorrect default permissions in ASP.NET Core allows an authorized attacker to elevate privileges locally.
Impact & technical details
Elevation of Privilege
What privileges could be gained by an attacker who successfully exploited this vulnerability? An attacker who successfully exploited this vulnerability could gain the highest privileges on the system.
- CVSS base score
- Not supplied
Affected products
- .NET 10.0 installed on Linux
- .NET 10.0 installed on Mac OS
- .NET 10.0 installed on Windows
- .NET 11.0 installed on Linux
- .NET 11.0 installed on Mac OS
- .NET 11.0 installed on Windows
- .NET 8.0 installed on Linux
- .NET 8.0 installed on Mac OS
Show all 14 affected products
- .NET 8.0 installed on Windows
- .NET 9.0 installed on Linux
- .NET 9.0 installed on Mac OS
- .NET 9.0 installed on Windows
- .NET source-build Linux tarballs (all archive types)
- ASP.NET Core runtime and targeting-pack Linux tarballs (Microsoft-published)
Source guidance
Remediation
- Release Notes
At least one Microsoft vendor-fix reference is available. Check each affected product for its applicable update, prerequisites, and supported version.
GTP recommendation · Rule-based guidance
Recommended next step
Review affected Microsoft products and apply the applicable security updates through your organization's normal patch-management process. Confirm availability and prerequisites in the Microsoft advisory.
Authoritative sources & updates
Findings and update information come from the linked publishers. GTP compiles the public record and provides the recommendation above. CVSS ratings shown here come from Microsoft. NVD references provide additional public context.
- Microsoft Security Response Center (opens in a new tab)
- Microsoft security update · 5133964 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5133965 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5133966 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · Release Notes (opens in a new tab)
Managed by GTP?
Griffin Technology Partners managed customers may receive additional environment-specific security guidance and remediation assistance through their managed services relationship.
Security bulletins are provided for informational purposes and compiled from authoritative public sources. Vulnerability applicability varies by environment. Validate affected products, configuration, compatibility requirements, and vendor guidance before making production changes.