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TI-2026-82582 Aliases CVE-2026-114148

Incorrect default permissions in ASP.NET Core allow local escalation

Priority LOW 36CWE-276Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 12 fixed, 2 without a fix

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

Summary

Incorrect default permissions in ASP.NET Core in Microsoft .NET 8.0 before 8.0.427, 9.0 before 9.0.320, 10.0 before 10.0.403 and 11.0 from 11.0.0-preview.1 before 11.0.100-rc.3 let an authorized local attacker escalate privileges. The flaw is classified as CWE-276, and the CVSS vector rates confidentiality, integrity and availability impact as high.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Description from the CNA

Incorrect default permissions in ASP.NET Core allows an authorized attacker to elevate privileges locally.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00355 29th percentileScored 2026-11-07
Fix Partial Red Hat: 16 advisoriesMicrosoft: 3 updatesRed Hat: 12 fixed, 2 without a fix

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 installed on Linux10.0.0 to before 10.0.40310.0.403Patch availableCNA
Microsoft.NET 10.0 installed on Mac OS10.0.0 to before 10.0.40310.0.403Patch availableCNA
Microsoft.NET 10.0 installed on Windows10.0.0 to before 10.0.40310.0.403Patch availableCNA
Microsoft.NET 11.0 installed on Linux11.0.0-preview.1 to before 11.0.100-rc.311.0.100-rc.3Patch availableCNA
Microsoft.NET 11.0 installed on Mac OS11.0.0-preview.1 to before 11.0.100-rc.311.0.100-rc.3Patch availableCNA
Microsoft.NET 11.0 installed on Windows11.0.0-preview.1 to before 11.0.100-rc.311.0.100-rc.3Patch availableCNA
Microsoft.NET 8.0 installed on Linux8.0.0 to before 8.0.4278.0.427Patch availableCNA
Microsoft.NET 8.0 installed on Mac OS8.0.0 to before 8.0.4278.0.427Patch availableCNA
Microsoft.NET 8.0 installed on Windows8.0.0 to before 8.0.4278.0.427Patch availableCNA
Microsoft.NET 9.0 installed on Linux9.0.0 to before 9.0.3209.0.320Patch availableCNA
Microsoft.NET 9.0 installed on Mac OS9.0.0 to before 9.0.3209.0.320Patch availableCNA
Microsoft.NET 9.0 installed on Windows9.0.0 to before 9.0.3209.0.320Patch availableCNA
Microsoft.NET source-build Linux tarballs (all archive types)8.0.100 to before 10.0.403-servicing.26523.11210.0.403-servicing.26523.112Patch availableCNA
MicrosoftASP.NET Core runtime and targeting-pack Linux tarballs (Microsoft-published)8.0.0 to before 9.0.229.0.22Patch availableCNA
  • .NET 10.0 installed on Linux VendorMicrosoft Affected 10.0.0 to before 10.0.403 Fixed in 10.0.403 Patch available CNA
  • .NET 10.0 installed on Mac OS VendorMicrosoft Affected 10.0.0 to before 10.0.403 Fixed in 10.0.403 Patch available CNA
  • .NET 10.0 installed on Windows VendorMicrosoft Affected 10.0.0 to before 10.0.403 Fixed in 10.0.403 Patch available CNA
  • .NET 11.0 installed on Linux VendorMicrosoft Affected 11.0.0-preview.1 to before 11.0.100-rc.3 Fixed in 11.0.100-rc.3 Patch available CNA
  • .NET 11.0 installed on Mac OS VendorMicrosoft Affected 11.0.0-preview.1 to before 11.0.100-rc.3 Fixed in 11.0.100-rc.3 Patch available CNA
  • .NET 11.0 installed on Windows VendorMicrosoft Affected 11.0.0-preview.1 to before 11.0.100-rc.3 Fixed in 11.0.100-rc.3 Patch available CNA
  • .NET 8.0 installed on Linux VendorMicrosoft Affected 8.0.0 to before 8.0.427 Fixed in 8.0.427 Patch available CNA
  • .NET 8.0 installed on Mac OS VendorMicrosoft Affected 8.0.0 to before 8.0.427 Fixed in 8.0.427 Patch available CNA
  • .NET 8.0 installed on Windows VendorMicrosoft Affected 8.0.0 to before 8.0.427 Fixed in 8.0.427 Patch available CNA
  • .NET 9.0 installed on Linux VendorMicrosoft Affected 9.0.0 to before 9.0.320 Fixed in 9.0.320 Patch available CNA
  • .NET 9.0 installed on Mac OS VendorMicrosoft Affected 9.0.0 to before 9.0.320 Fixed in 9.0.320 Patch available CNA
  • .NET 9.0 installed on Windows VendorMicrosoft Affected 9.0.0 to before 9.0.320 Fixed in 9.0.320 Patch available CNA
  • .NET source-build Linux tarballs (all archive types) VendorMicrosoft Affected 8.0.100 to before 10.0.403-servicing.26523.112 Fixed in 10.0.403-servicing.26523.112 Patch available CNA
  • ASP.NET Core runtime and targeting-pack Linux tarballs (Microsoft-published) VendorMicrosoft Affected 8.0.0 to before 9.0.22 Fixed in 9.0.22 Patch available CNA

Remediation

Upgrade .NET 8.0 to 8.0.427, .NET 9.0 to 9.0.320, .NET 10.0 to 10.0.403 and .NET 11.0 to 11.0.100-rc.3, and use ASP.NET Core runtime 9.0.22 for Linux tarballs or source-build Linux tarballs 10.0.403-servicing.26523.112. Red Hat fixes are in advisories such as RHSA-2026:92420, RHSA-2026:92428 and RHSA-2026:92438. Red Hat lists Red Hat Enterprise Linux 9 and 10 as affected without a fix and gives no plan.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Red Hat 16 advisories

  • RHSA-2026:93457 Released 2026-11-02 · Red Hat rating Important
    .NET 8.0 security update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) dotnet-sdk-8.0-source-built-artifacts-8.0.133-1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) aspnetcore-runtime-8.0-8.0.33-1.el9_6, aspnetcore-runtime-dbg-8.0-8.0.33-1.el9_6, aspnetcore-targeting-pack-8.0-8.0.33-1.el9_6 +9
  • RHSA-2026:93459 Released 2026-11-02 · Red Hat rating Important
    .NET 9.0 security update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) dotnet-sdk-9.0-source-built-artifacts-9.0.123-1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) aspnetcore-runtime-9.0-9.0.22-1.el9_6, aspnetcore-runtime-dbg-9.0-9.0.22-1.el9_6, aspnetcore-targeting-pack-9.0-9.0.22-1.el9_6 +12
  • RHSA-2026:93456 Released 2026-11-02 · Red Hat rating Important
    .NET 8.0 security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) aspnetcore-runtime-8.0-8.0.33-1.el9_4, aspnetcore-runtime-dbg-8.0-8.0.33-1.el9_4, aspnetcore-targeting-pack-8.0-8.0.33-1.el9_4 +11
Show 13 more Red Hat advisories
  • RHSA-2026:93458 Released 2026-11-02 · Red Hat rating Important
    .NET 9.0 security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) aspnetcore-runtime-9.0-9.0.22-1.el10_0, aspnetcore-runtime-dbg-9.0-9.0.22-1.el10_0, aspnetcore-targeting-pack-9.0-9.0.22-1.el10_0 +12
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) dotnet-sdk-9.0-source-built-artifacts-9.0.123-1.el10_0
  • RHSA-2026:93455 Released 2026-11-02 · Red Hat rating Important
    .NET 8.0 security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) aspnetcore-runtime-8.0-8.0.33-1.el10_0, aspnetcore-runtime-dbg-8.0-8.0.33-1.el10_0, aspnetcore-targeting-pack-8.0-8.0.33-1.el10_0 +9
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) dotnet-sdk-8.0-source-built-artifacts-8.0.133-1.el10_0
  • RHSA-2026:92432 Released 2026-10-29 · Red Hat rating Important
    .NET 10.0 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) aspnetcore-runtime-10.0-10.0.14-1.el9_8, aspnetcore-runtime-dbg-10.0-10.0.14-1.el9_8, aspnetcore-targeting-pack-10.0-10.0.14-1.el9_8 +11
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) dotnet-sdk-10.0-source-built-artifacts-10.0.114-1.el9_8
  • RHSA-2026:92492 Released 2026-10-29 · Red Hat rating Important
    .NET 8.0 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) aspnetcore-runtime-8.0-8.0.33-1.el9_8, aspnetcore-runtime-dbg-8.0-8.0.33-1.el9_8, aspnetcore-targeting-pack-8.0-8.0.33-1.el9_8 +9
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) dotnet-sdk-8.0-source-built-artifacts-8.0.133-1.el9_8
  • RHSA-2026:92429 Released 2026-10-29 · Red Hat rating Important
    .NET 9.0 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) aspnetcore-runtime-9.0-9.0.22-1.el9_8, aspnetcore-runtime-dbg-9.0-9.0.22-1.el9_8, aspnetcore-targeting-pack-9.0-9.0.22-1.el9_8 +11
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) dotnet-sdk-9.0-source-built-artifacts-9.0.123-1.el9_8
  • RHSA-2026:92511 Released 2026-10-29 · Red Hat rating Important
    .NET 11.0 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) aspnetcore-runtime-11.0-11.0.0~rc.3.26522.148-0.12.el8_10, aspnetcore-runtime-dbg-11.0-11.0.0~rc.3.26522.148-0.12.el8_10, aspnetcore-targeting-pack-11.0-11.0.0~rc.3.26522.148-0.12.el8_10 +12
    • Red Hat Enterprise Linux CRB (v. 8) dotnet-sdk-11.0-source-built-artifacts-11.0.100~rc.3.26522.148-0.12.el8_10
  • RHSA-2026:92438 Released 2026-10-29 · Red Hat rating Important
    .NET 10.0 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 10) aspnetcore-runtime-10.0-10.0.14-1.el10_2, aspnetcore-runtime-dbg-10.0-10.0.14-1.el10_2, aspnetcore-targeting-pack-10.0-10.0.14-1.el10_2 +11
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) dotnet-sdk-10.0-source-built-artifacts-10.0.114-1.el10_2
  • RHSA-2026:92430 Released 2026-10-29 · Red Hat rating Important
    .NET 9.0 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 10) aspnetcore-runtime-9.0-9.0.22-1.el10_2, aspnetcore-runtime-dbg-9.0-9.0.22-1.el10_2, aspnetcore-targeting-pack-9.0-9.0.22-1.el10_2 +11
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) dotnet-sdk-9.0-source-built-artifacts-9.0.123-1.el10_2
  • RHSA-2026:92428 Released 2026-10-29 · Red Hat rating Important
    .NET 8.0 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 10) aspnetcore-runtime-8.0-8.0.33-1.el10_2, aspnetcore-runtime-dbg-8.0-8.0.33-1.el10_2, aspnetcore-targeting-pack-8.0-8.0.33-1.el10_2 +9
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) dotnet-sdk-8.0-source-built-artifacts-8.0.133-1.el10_2
  • RHSA-2026:92431 Released 2026-10-29 · Red Hat rating Important
    .NET 10.0 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) aspnetcore-runtime-10.0-10.0.14-1.el8_10, aspnetcore-runtime-dbg-10.0-10.0.14-1.el8_10, aspnetcore-targeting-pack-10.0-10.0.14-1.el8_10 +10
    • Red Hat Enterprise Linux CRB (v. 8) dotnet-sdk-10.0-source-built-artifacts-10.0.114-1.el8_10
  • RHSA-2026:92427 Released 2026-10-29 · Red Hat rating Important
    .NET 9.0 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) aspnetcore-runtime-9.0-9.0.22-1.el8_10, aspnetcore-runtime-dbg-9.0-9.0.22-1.el8_10, aspnetcore-targeting-pack-9.0-9.0.22-1.el8_10 +11
    • Red Hat Enterprise Linux CRB (v. 8) dotnet-sdk-9.0-source-built-artifacts-9.0.123-1.el8_10
  • RHSA-2026:92420 Released 2026-10-29 · Red Hat rating Important
    .NET 8.0 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) aspnetcore-runtime-8.0-8.0.33-1.el8_10, aspnetcore-runtime-dbg-8.0-8.0.33-1.el8_10, aspnetcore-targeting-pack-8.0-8.0.33-1.el8_10 +9
    • Red Hat Enterprise Linux CRB (v. 8) dotnet-sdk-8.0-source-built-artifacts-8.0.133-1.el8_10
  • RHSA-2026:91709 Released 2026-10-28 · Red Hat rating Important
    Red Hat Hardened Images RPMs Security Update
    • Red Hat Hardened Images aspnetcore-runtime-8.0-8.0.33-0.1.hum1@aarch64, aspnetcore-runtime-8.0-8.0.33-0.1.hum1@x86_64, aspnetcore-runtime-dbg-8.0-8.0.33-0.1.hum1@aarch64 +22

Microsoft 3 updates

  • KB5133966
    Security Update
    • .NET 10.0 installed on Linux 10.0.403
    • .NET 10.0 installed on Mac OS 10.0.403
    • .NET 10.0 installed on Windows 10.0.403
    • .NET source-build Linux tarballs (all archive types) 10.0.403-servicing.26523.112
    • Microsoft.AspNetCore.Components.WebAssembly.DevServer 10.0.14
    • Microsoft.AspNetCore.Components.WebAssembly.Server 10.0.14
  • KB5133965
    Security Update
    • .NET 9.0 installed on Linux 9.0.320
    • .NET 9.0 installed on Mac OS 9.0.320
    • .NET 9.0 installed on Windows 9.0.320
    • ASP.NET Core runtime and targeting-pack Linux tarballs (Microsoft-published) 9.0.22
  • KB5133964
    Security Update
    • .NET 8.0 installed on Linux 8.0.427
    • .NET 8.0 installed on Mac OS 8.0.427
    • .NET 8.0 installed on Windows 8.0.427

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:93457, RHSA-2026:93459
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:92428, RHSA-2026:92430, RHSA-2026:92438
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:92420, RHSA-2026:92427, RHSA-2026:92431, RHSA-2026:92511
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:92429, RHSA-2026:92432, RHSA-2026:92492
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:93456
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:93455, RHSA-2026:93458
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:93457, RHSA-2026:93459
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:92420, RHSA-2026:92427, RHSA-2026:92431, RHSA-2026:92511
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:92428, RHSA-2026:92430, RHSA-2026:92438
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:92429, RHSA-2026:92432, RHSA-2026:92492
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:93455, RHSA-2026:93458
Red Hat Hardened ImagesFixed RHSA-2026:91709
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 installed on LinuxFixed 11.0.100-rc.3 · Security Update
.NET 11.0 installed on Mac OSFixed 11.0.100-rc.3 · Security Update
.NET 11.0 installed on WindowsFixed 11.0.100-rc.3 · Security Update

Timeline

  1. 2026-10-29 Threatist record created from CVE-2026-114148
  2. 2026-10-30 Affected versions changed · Red Hat
  3. 2026-10-30 CVSS score added · Red Hat
  4. 2026-10-30 Fix available: RHSA-2026:91709 · Red Hat
  5. 2026-10-30 Fix available: Red Hat Hardened Images · Red Hat
  6. 2026-10-30 CISA SSVC decision points changed
  7. 2026-10-30 Priority changed: MEDIUM → LOW
  8. 2026-10-30 Fix available: RHSA-2026:92428 · Red Hat
  9. 2026-10-30 Fix available: RHSA-2026:92492 · Red Hat
  10. 2026-10-30 Fix available: RHSA-2026:92420 · Red Hat
  11. 2026-10-30 Fix available: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux AppStream (v. 9) +3 · Red Hat
  12. 2026-11-02 Fix available: RHSA-2026:92427 · Red Hat
  13. 2026-11-02 Fix available: RHSA-2026:92429 · Red Hat
  14. 2026-11-02 Fix available: RHSA-2026:92431 · Red Hat
  15. 2026-11-02 Fix available: RHSA-2026:92430 · Red Hat
  16. 2026-11-02 Fix available: RHSA-2026:92432 · Red Hat
  17. 2026-11-02 Fix available: RHSA-2026:93455 · Red Hat
  18. 2026-11-02 Fix available: RHSA-2026:92511 · Red Hat
  19. 2026-11-02 Fix available: RHSA-2026:93458 · Red Hat
  20. 2026-11-02 Fix available: RHSA-2026:92438 · Red Hat
  21. 2026-11-02 Fix available: RHSA-2026:93459 · Red Hat
  22. 2026-11-02 Fix available: RHSA-2026:93457 · Red Hat
  23. 2026-11-02 Fix available: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux AppStream EUS (v.9.6) +1 · Red Hat
  24. 2026-11-02 Fix available: RHSA-2026:93456 · Red Hat
  25. 2026-11-02 Fix available: Red Hat Enterprise Linux AppStream E4S (v.9.4) · Red Hat

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