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TI-2026-72241 Aliases CVE-2026-70161

Path traversal in .NET enables local privilege escalation

Priority LOW 35CWE-22Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Microsoft. Impact type from Microsoft.

Summary

Microsoft .NET 9.0, 10.0 and 11.0 runtimes and Visual Studio 2022 version 17.14 and Visual Studio 2026 version 18.10 are affected. Improper limitation of a pathname to a restricted directory (CWE-22) in .NET lets an authorized attacker escalate privileges locally. The attacker needs low privileges, and a user must interact with the affected product.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Description from the CNA

Improper limitation of a pathname to a restricted directory ('path traversal') in .NET allows an authorized attacker to elevate privileges locally.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0049 42nd percentileScored 2026-11-07
Fix Fixed Microsoft: 2 updates

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Microsoft.NET 10.0 runtime10.0.0 to before 10.0.40210.0.402Patch availableCNA
Microsoft.NET 11.0 runtime11.0.0 to before 11.0.100-rc.211.0.100-rc.2Patch availableCNA
Microsoft.NET 9.0 runtime9.0.0 to before 9.0.319, 9.0.1229.0.319, 9.0.122Patch availableCNA
MicrosoftMicrosoft Visual Studio 2022 version 17.1417.14.0 to before 17.14.4217.14.42Patch availableCNA
MicrosoftMicrosoft Visual Studio 2026 version 18.1018.10.0 to before 18.10.418.10.4Patch availableCNA
  • .NET 10.0 runtime VendorMicrosoft Affected 10.0.0 to before 10.0.402 Fixed in 10.0.402 Patch available CNA
  • .NET 11.0 runtime VendorMicrosoft Affected 11.0.0 to before 11.0.100-rc.2 Fixed in 11.0.100-rc.2 Patch available CNA
  • .NET 9.0 runtime VendorMicrosoft Affected 9.0.0 to before 9.0.319, 9.0.122 Fixed in 9.0.319, 9.0.122 Patch available CNA
  • Microsoft Visual Studio 2022 version 17.14 VendorMicrosoft Affected 17.14.0 to before 17.14.42 Fixed in 17.14.42 Patch available CNA
  • Microsoft Visual Studio 2026 version 18.10 VendorMicrosoft Affected 18.10.0 to before 18.10.4 Fixed in 18.10.4 Patch available CNA

Remediation

Install .NET 10.0 runtime 10.0.402 (advisory KB5130036) and .NET 9.0 runtime 9.0.319 or 9.0.122 (advisory KB5130035). Install .NET 11.0 runtime 11.0.100-rc.2, Visual Studio 2022 version 17.14 build 17.14.42, and Visual Studio 2026 version 18.10 build 18.10.4.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Microsoft 2 updates

  • KB5130036
    Security Update
    • .NET 10.0 installed on Windows 10.0.13
    • .NET 10.0 runtime installed on Linux 10.0.13
    • .NET 10.0 runtime installed on Mac OS 10.0.13
    • .NET 10.0 runtime installed on Windows 10.0.13, 10.0.402
  • KB5130035
    Security Update
    • .NET 9.0 installed on Windows 9.0.21
    • .NET 9.0 runtime installed on Linux 9.0.21
    • .NET 9.0 runtime installed on Mac OS 9.0.21
    • .NET 9.0 runtime installed on Windows 9.0.21, 9.0.319, 9.0.122

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat Hardened Images

Microsoft

Microsoft's page for this CVE →

Impact
Elevation of Privilege
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely
ProductStatusPlan or fix
.NET 11.0 runtime installed on WindowsFixed 11.0.100-rc.2 · Security Update
Microsoft Visual Studio 2022 version 17.14Fixed 17.14.42 · Security Update
Microsoft Visual Studio 2026 version 18.10Fixed 18.10.4 · Security Update

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-70161
  2. 2026-10-13 CISA SSVC decision points changed
  3. 2026-10-14 Priority changed: MEDIUM → LOW
  4. 2026-10-14 CISA SSVC decision points changed
  5. 2026-10-18 Affected versions changed · Red Hat
  6. 2026-10-18 CVSS score added · Red Hat
  7. 2026-10-23 Fix available: Microsoft/.NET 10.0 [email protected], Microsoft/.NET 11.0 [email protected], Microsoft/.NET 9.0 [email protected], 9.0.122 · CNA
  8. 2026-10-27 Fix available: KB5130035, KB5130036 · Microsoft

References

Patch 1

  • TI-2026-42212 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-37256 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-26194 Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-16982 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-36863 Windows Server Update Service (WSUS) Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-33671 Microsoft SharePoint Server Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
See all 18045 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences