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TI-2026-44934 Aliases CVE-2026-62871GHSA-vg44-h755-9hw7

.NET Elevation of Privilege Vulnerability

Priority LOW 36CWE-122Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

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

Summary

Out-of-bounds write in .NET allows an unauthorized attacker to execute code locally.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00466 40th percentileScored 2026-11-07
Fix Fixed Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet): 10.0.11, 9.0.19, 8.0.30Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet): 10.0.11, 9.0.19, 8.0.30+1 more productMicrosoft: 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 8.0 runtime8.0.0 to before 8.0.308.0.30Patch availableCNA
Microsoft.NET 9.0 runtime9.0.0 to before 9.0.199.0.19Patch availableCNA
MicrosoftMicrosoft Visual Studio 2022 version 17.1417.14.0 to before 17.14.3817.14.38Patch availableCNA
MicrosoftMicrosoft Visual Studio 2026 version 18.818.0 to before 18.8.318.8.3Patch availableCNA
—Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet)10.0.0 to before 10.0.1110.0.11Patch availableGHSA-vg44-h755-9hw7
—Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet)10.0.0 to before 10.0.1110.0.11Patch availableGHSA-vg44-h755-9hw7
—Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet)10.0.0 to before 10.0.1110.0.11Patch availableGHSA-vg44-h755-9hw7
—Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet)9.0.0 to before 9.0.199.0.19Patch availableGHSA-vg44-h755-9hw7
—Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet)9.0.0 to before 9.0.199.0.19Patch availableGHSA-vg44-h755-9hw7
—Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet)9.0.0 to before 9.0.199.0.19Patch availableGHSA-vg44-h755-9hw7
—Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet)8.0.0 to before 8.0.308.0.30Patch availableGHSA-vg44-h755-9hw7
—Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet)8.0.0 to before 8.0.308.0.30Patch availableGHSA-vg44-h755-9hw7
—Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet)8.0.0 to before 8.0.308.0.30Patch availableGHSA-vg44-h755-9hw7
  • .NET 8.0 runtime VendorMicrosoft Affected 8.0.0 to before 8.0.30 Fixed in 8.0.30 Patch available CNA
  • .NET 9.0 runtime VendorMicrosoft Affected 9.0.0 to before 9.0.19 Fixed in 9.0.19 Patch available CNA
  • Microsoft Visual Studio 2022 version 17.14 VendorMicrosoft Affected 17.14.0 to before 17.14.38 Fixed in 17.14.38 Patch available CNA
  • Microsoft Visual Studio 2026 version 18.8 VendorMicrosoft Affected 18.0 to before 18.8.3 Fixed in 18.8.3 Patch available CNA
  • Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet) Vendor— Affected 10.0.0 to before 10.0.11 Fixed in 10.0.11 Patch available GHSA-vg44-h755-9hw7
  • Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet) Vendor— Affected 10.0.0 to before 10.0.11 Fixed in 10.0.11 Patch available GHSA-vg44-h755-9hw7
  • Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet) Vendor— Affected 10.0.0 to before 10.0.11 Fixed in 10.0.11 Patch available GHSA-vg44-h755-9hw7
  • Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet) Vendor— Affected 9.0.0 to before 9.0.19 Fixed in 9.0.19 Patch available GHSA-vg44-h755-9hw7
  • Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet) Vendor— Affected 9.0.0 to before 9.0.19 Fixed in 9.0.19 Patch available GHSA-vg44-h755-9hw7
  • Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet) Vendor— Affected 9.0.0 to before 9.0.19 Fixed in 9.0.19 Patch available GHSA-vg44-h755-9hw7
  • Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet) Vendor— Affected 8.0.0 to before 8.0.30 Fixed in 8.0.30 Patch available GHSA-vg44-h755-9hw7
  • Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet) Vendor— Affected 8.0.0 to before 8.0.30 Fixed in 8.0.30 Patch available GHSA-vg44-h755-9hw7
  • Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet) Vendor— Affected 8.0.0 to before 8.0.30 Fixed in 8.0.30 Patch available GHSA-vg44-h755-9hw7

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*8.0.0 to before 8.0.30; 9.0.0 to before 9.0.19VulnerableMicrosoft
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*not specified by NVDRunning onApple
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*not specified by NVDRunning onLinux
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*10.0.0 to before 10.0.11VulnerableMicrosoft
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*17.14.0 to before 17.14.38VulnerableMicrosoft
cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*18.8.0 to before 18.8.3VulnerableMicrosoft
  • cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* Versions 8.0.0 to before 8.0.30; 9.0.0 to before 9.0.19 Vulnerable ·Microsoft
  • cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Apple
  • cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Linux
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
  • cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* Versions 10.0.0 to before 10.0.11 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:* Versions 17.14.0 to before 17.14.38 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:* Versions 18.8.0 to before 18.8.3 Vulnerable ·Microsoft

Remediation

  • Fix · GHSA-vg44-h755-9hw7 Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet) Fixed in 10.0.11 Advisory →
  • Fix · GHSA-vg44-h755-9hw7 Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet) Fixed in 10.0.11 Advisory →
  • Fix · GHSA-vg44-h755-9hw7 Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet) Fixed in 10.0.11 Advisory →
  • Fix · GHSA-vg44-h755-9hw7 Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet) Fixed in 9.0.19 Advisory →
  • Fix · GHSA-vg44-h755-9hw7 Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet) Fixed in 9.0.19 Advisory →
  • Fix · GHSA-vg44-h755-9hw7 Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet) Fixed in 9.0.19 Advisory →
  • Fix · GHSA-vg44-h755-9hw7 Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet) Fixed in 8.0.30 Advisory →
  • Fix · GHSA-vg44-h755-9hw7 Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet) Fixed in 8.0.30 Advisory →
  • Fix · GHSA-vg44-h755-9hw7 Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet) Fixed in 8.0.30 Advisory →

Microsoft 2 updates

  • KB5122105
    Security Update
    • .NET 9.0 installed on Linux 9.0.19
    • .NET 9.0 installed on Mac OS 9.0.19
    • .NET 9.0 installed on Windows 9.0.19
  • KB5122104
    Security Update
    • .NET 8.0 installed on Linux 8.0.30
    • .NET 8.0 installed on Mac OS 8.0.30
    • .NET 8.0 installed on Windows 8.0.30

Vendor assessments

Red Hat

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

Not affected: 5 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Hardened Images
  • Red Hat OpenShift Dev Spaces

Microsoft

Microsoft's page for this CVE →

Impact
Remote Code Execution
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely
ProductStatusPlan or fix
Microsoft Visual Studio 2022 version 17.14Fixed17.14.38 Security Update
Microsoft Visual Studio 2026 version 18.8Fixed18.8.3 Security Update

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-62871
  2. 2026-10-03 Alias added: GHSA-vg44-h755-9hw7
  3. 2026-10-28 Fix available: Microsoft/.NET 8.0 [email protected], Microsoft/.NET 9.0 [email protected] · CNA

References

Patch 1

Advisory 1

Other 3

  • TI-2026-79288 Out-of-bounds write in Google Brotli decoder KEVCVSS 4.0CRITICAL 9.2
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2023-19596 .NET and Visual Studio Denial of Service Vulnerability KEVCVSS 3.1HIGH 7.5
  • TI-2023-19588 Microsoft QUIC Denial of Service Vulnerability CVSS 3.1HIGH 7.5
  • TI-2024-14152 .NET and Visual Studio Denial of Service Vulnerability CVSS 3.1HIGH 7.5
  • TI-2021-08380 .NET Core Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
See all 129 →

Sources

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