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CVE-2026-70161: .NET Elevation of Privilege Vulnerability
- Severity: high (CVSS 7.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-13 · updated 2026-10-31
- Weakness: CWE-22
Description
Improper limitation of a pathname to a restricted directory ('path traversal') in .NET allows an authorized attacker to elevate privileges locally.
Affected products
- Microsoft .NET 10.0 runtime: from 10.0.0 before 10.0.402 — fixed in 10.0.402
- Microsoft .NET 11.0 runtime: from 11.0.0 before 11.0.100-rc.2 — fixed in 11.0.100-rc.2
- Microsoft .NET 9.0 runtime: from 9.0.0 before 9.0.319, 9.0.122 — fixed in 9.0.319, 9.0.122
- Microsoft Visual Studio 2026 version 18.10: from 18.10.0 before 18.10.4 — fixed in 18.10.4
- Microsoft Visual Studio 2022 version 17.14: from 17.14.0 before 17.14.42 — fixed in 17.14.42
How to fix
Upgrade to a fixed version: Microsoft .NET 10.0 runtime 10.0.402; Microsoft .NET 11.0 runtime 11.0.100-rc.2; Microsoft .NET 9.0 runtime 9.0.319, 9.0.122; Microsoft Visual Studio 2026 version 18.10 18.10.4; Microsoft Visual Studio 2022 version 17.14 17.14.42. Check the vendor advisory for mitigations.
In the news
References
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