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TI-2026-72133 Aliases CVE-2026-70007GHSA-pfwj-2f93-rf42

Out-of-bounds write in .NET Framework allows remote code execution

Priority MEDIUM 41CWE-787Published · Updated

Key facts

Attack vector
Network
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, Red Hat and Microsoft. Impact type from Microsoft.

Summary

Multiple Microsoft .NET runtimes, .NET Framework versions and Visual Studio versions are affected. An out-of-bounds write (CWE-787) lets data be written outside the intended memory bounds. An unauthorized remote attacker can execute code, but the victim must interact with the product.

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

Description from the CNA

Out-of-bounds write in .NET Framework allows an unauthorized attacker to execute code over a network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00801 56th percentileScored 2026-11-07
Fix Fixed Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet): 9.0.21, 11.0.0-rc.2, 10.0.13 +1Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet): 9.0.21, 11.0.0-rc.2, 10.0.13 +1+1 more productRed Hat: 1 advisoryMicrosoft: 22 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 10.0.1310.0.13Patch availableCNA
Microsoft.NET 11.0 runtime11.0.0 to before 11.0.0-rc.211.0.0-rc.2Patch availableCNA
Microsoft.NET 8.0 runtime8.0.0 to before 8.0.328.0.32Patch availableCNA
Microsoft.NET 9.0 runtime9.0.0 to before 9.0.219.0.21Patch availableCNA
MicrosoftMicrosoft .NET Framework 3.53.5.0 to before 2.0.50727.8987 AND 3.0.30729.89822.0.50727.8987 AND 3.0.30729.8982Patch availableCNA
MicrosoftMicrosoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.23.0.0.0 to before 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.02.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0Patch availableCNA
MicrosoftMicrosoft .NET Framework 3.5 AND 4.7.24.7.0 to before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.02.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0Patch availableCNA
MicrosoftMicrosoft .NET Framework 3.5 AND 4.84.8.0 to before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.02.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0Patch availableCNA
MicrosoftMicrosoft .NET Framework 3.5 AND 4.8.14.8.1 to before 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.02.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0Patch availableCNA
MicrosoftMicrosoft .NET Framework 4.6.2/4.7/4.7.1/4.7.24.7.0 to before 4.7.4150.04.7.4150.0Patch availableCNA
MicrosoftMicrosoft .NET Framework 4.84.8.0 to before 4.8.4811.04.8.4811.0Patch availableCNA
MicrosoftMicrosoft .NET Framework 4.8.14.8.0.0 to before 4.8.9363.04.8.9363.0Patch 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
—Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet)9.0.0 to before 9.0.219.0.21Patch availableGHSA-pfwj-2f93-rf42
—Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet)9.0.0 to before 9.0.219.0.21Patch availableGHSA-pfwj-2f93-rf42
—Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet)9.0.0 to before 9.0.219.0.21Patch availableGHSA-pfwj-2f93-rf42
—Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet)11.0.0-preview.1 to before 11.0.0-rc.211.0.0-rc.2Patch availableGHSA-pfwj-2f93-rf42
—Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet)11.0.0-preview.1 to before 11.0.0-rc.211.0.0-rc.2Patch availableGHSA-pfwj-2f93-rf42
—Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet)11.0.0-preview.1 to before 11.0.0-rc.211.0.0-rc.2Patch availableGHSA-pfwj-2f93-rf42
—Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet)10.0.0 to before 10.0.1310.0.13Patch availableGHSA-pfwj-2f93-rf42
—Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet)10.0.0 to before 10.0.1310.0.13Patch availableGHSA-pfwj-2f93-rf42
—Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet)10.0.0 to before 10.0.1310.0.13Patch availableGHSA-pfwj-2f93-rf42
—Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet)8.0.0 to before 8.0.328.0.32Patch availableGHSA-pfwj-2f93-rf42
—Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet)8.0.0 to before 8.0.328.0.32Patch availableGHSA-pfwj-2f93-rf42
—Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet)8.0.0 to before 8.0.328.0.32Patch availableGHSA-pfwj-2f93-rf42
  • .NET 10.0 runtime VendorMicrosoft Affected 10.0.0 to before 10.0.13 Fixed in 10.0.13 Patch available CNA
  • .NET 11.0 runtime VendorMicrosoft Affected 11.0.0 to before 11.0.0-rc.2 Fixed in 11.0.0-rc.2 Patch available CNA
  • .NET 8.0 runtime VendorMicrosoft Affected 8.0.0 to before 8.0.32 Fixed in 8.0.32 Patch available CNA
  • .NET 9.0 runtime VendorMicrosoft Affected 9.0.0 to before 9.0.21 Fixed in 9.0.21 Patch available CNA
  • Microsoft .NET Framework 3.5 VendorMicrosoft Affected 3.5.0 to before 2.0.50727.8987 AND 3.0.30729.8982 Fixed in 2.0.50727.8987 AND 3.0.30729.8982 Patch available CNA
  • Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 VendorMicrosoft Affected 3.0.0.0 to before 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0 Fixed in 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0 Patch available CNA
  • Microsoft .NET Framework 3.5 AND 4.7.2 VendorMicrosoft Affected 4.7.0 to before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0 Fixed in 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0 Patch available CNA
  • Microsoft .NET Framework 3.5 AND 4.8 VendorMicrosoft Affected 4.8.0 to before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0 Fixed in 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0 Patch available CNA
  • Microsoft .NET Framework 3.5 AND 4.8.1 VendorMicrosoft Affected 4.8.1 to before 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 Fixed in 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 Patch available CNA
  • Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 VendorMicrosoft Affected 4.7.0 to before 4.7.4150.0 Fixed in 4.7.4150.0 Patch available CNA
  • Microsoft .NET Framework 4.8 VendorMicrosoft Affected 4.8.0 to before 4.8.4811.0 Fixed in 4.8.4811.0 Patch available CNA
  • Microsoft .NET Framework 4.8.1 VendorMicrosoft Affected 4.8.0.0 to before 4.8.9363.0 Fixed in 4.8.9363.0 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
  • Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet) Vendor— Affected 9.0.0 to before 9.0.21 Fixed in 9.0.21 Patch available GHSA-pfwj-2f93-rf42
  • Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet) Vendor— Affected 9.0.0 to before 9.0.21 Fixed in 9.0.21 Patch available GHSA-pfwj-2f93-rf42
  • Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet) Vendor— Affected 9.0.0 to before 9.0.21 Fixed in 9.0.21 Patch available GHSA-pfwj-2f93-rf42
  • Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet) Vendor— Affected 11.0.0-preview.1 to before 11.0.0-rc.2 Fixed in 11.0.0-rc.2 Patch available GHSA-pfwj-2f93-rf42
  • Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet) Vendor— Affected 11.0.0-preview.1 to before 11.0.0-rc.2 Fixed in 11.0.0-rc.2 Patch available GHSA-pfwj-2f93-rf42
  • Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet) Vendor— Affected 11.0.0-preview.1 to before 11.0.0-rc.2 Fixed in 11.0.0-rc.2 Patch available GHSA-pfwj-2f93-rf42
  • Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet) Vendor— Affected 10.0.0 to before 10.0.13 Fixed in 10.0.13 Patch available GHSA-pfwj-2f93-rf42
  • Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet) Vendor— Affected 10.0.0 to before 10.0.13 Fixed in 10.0.13 Patch available GHSA-pfwj-2f93-rf42
  • Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet) Vendor— Affected 10.0.0 to before 10.0.13 Fixed in 10.0.13 Patch available GHSA-pfwj-2f93-rf42
  • Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet) Vendor— Affected 8.0.0 to before 8.0.32 Fixed in 8.0.32 Patch available GHSA-pfwj-2f93-rf42
  • Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet) Vendor— Affected 8.0.0 to before 8.0.32 Fixed in 8.0.32 Patch available GHSA-pfwj-2f93-rf42
  • Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet) Vendor— Affected 8.0.0 to before 8.0.32 Fixed in 8.0.32 Patch available GHSA-pfwj-2f93-rf42

Remediation

Update the .NET 8.0 runtime to 8.0.32 (KB5130034), the .NET 9.0 runtime to 9.0.21 (KB5130035), the .NET 10.0 runtime to 10.0.13 (KB5130036) and the .NET 11.0 runtime to 11.0.0-rc.2. Update Visual Studio 2022 version 17.14 to 17.14.42 and Visual Studio 2026 version 18.10 to 18.10.4. Fixed Microsoft .NET Framework builds are in KB5127685, KB5127686, KB5127687, KB5127688, KB5127689, KB5127690, KB5127691, KB5127692, KB5127693, KB5127694 and KB5127696. Red Hat fixes Red Hat Hardened Images in RHSA-2026:84693.

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

  • Fix · GHSA-pfwj-2f93-rf42 Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet) Fixed in 9.0.21 Advisory →
  • Fix · GHSA-pfwj-2f93-rf42 Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet) Fixed in 9.0.21 Advisory →
  • Fix · GHSA-pfwj-2f93-rf42 Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet) Fixed in 9.0.21 Advisory →
  • Fix · GHSA-pfwj-2f93-rf42 Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet) Fixed in 11.0.0-rc.2 Advisory →
  • Fix · GHSA-pfwj-2f93-rf42 Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet) Fixed in 11.0.0-rc.2 Advisory →
  • Fix · GHSA-pfwj-2f93-rf42 Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet) Fixed in 11.0.0-rc.2 Advisory →
  • Fix · GHSA-pfwj-2f93-rf42 Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet) Fixed in 10.0.13 Advisory →
  • Fix · GHSA-pfwj-2f93-rf42 Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet) Fixed in 10.0.13 Advisory →
  • Fix · GHSA-pfwj-2f93-rf42 Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet) Fixed in 10.0.13 Advisory →
  • Fix · GHSA-pfwj-2f93-rf42 Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet) Fixed in 8.0.32 Advisory →
  • Fix · GHSA-pfwj-2f93-rf42 Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet) Fixed in 8.0.32 Advisory →
  • Fix · GHSA-pfwj-2f93-rf42 Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet) Fixed in 8.0.32 Advisory →

Red Hat 1 advisory

  • RHSA-2026:84693 Released 2026-10-19 · Red Hat rating Important
    Red Hat Hardened Images RPMs Security Update
    • Red Hat Hardened Images aspnetcore-runtime-8.0-8.0.32-0.1.hum1@aarch64, aspnetcore-runtime-8.0-8.0.32-0.1.hum1@x86_64, aspnetcore-runtime-dbg-8.0-8.0.32-0.1.hum1@aarch64 +22

Microsoft 22 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
  • KB5130034
    Security Update
    • .NET 8.0 installed on Windows 8.0.32
    • .NET 8.0 runtime installed on Linux 8.0.32
    • .NET 8.0 runtime installed on Mac OS 8.0.32
    • .NET 8.0 runtime installed on Windows 8.0.32
Show 19 more Microsoft updates
  • KB5127696
    Security Update
    • Microsoft .NET Framework 3.5 2.0.50727.9188 AND 3.0.30729.9171
  • KB5127694
    Security Update
    • Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.10008.0
  • KB5127693
    Security Update
    • Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0
  • KB5127692
    Security Update
    • Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0
  • KB5127691
    Security Update
    • Microsoft .NET Framework 4.8.1 4.8.9363.0
  • KB5127690
    Security Update
    • Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0
  • KB5127689
    Security Update
    • Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0
  • KB5127688
    Security Update
    • Microsoft .NET Framework 4.8 4.8.4811.0
  • KB5127687
    Security Update
    • Microsoft .NET Framework 3.5 AND 4.8 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.4811.0
  • KB5127686
    Security Update
    • Microsoft .NET Framework 4.8 4.8.4811.0
  • KB5127685
    Security Update
    • Microsoft .NET Framework 3.5 AND 4.8 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0
  • KB5127684
    Security Update
    • Microsoft .NET Framework 4.8 4.8.4811.0
  • KB5127683
    Security Update
    • Microsoft .NET Framework 3.5 AND 4.8 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.4811.0
  • KB5127668
    Security Update
    • Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 4.7.4150.0
  • KB5127667
    Security Update
    • Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 4.7.4150.0
  • KB5127666
    Security Update
    • Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0
    • Microsoft .NET Framework 3.5 AND 4.7.2 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0
  • KB5127664
    Security Update
    • Microsoft .NET Framework 3.5 2.0.50727.8987 AND 3.0.30729.8982
  • KB5127660
    Security Update
    • Microsoft .NET Framework 3.5 2.0.50727.8987 AND 3.0.30729.8982
  • KB5126868
    Security Update
    • Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0
    • Windows 10 Version 1607 for 32-bit Systems 10.0.14393.9612
    • Windows 10 Version 1607 for x64-based Systems 10.0.14393.9612
    • Windows Server 2016 10.0.14393.9612
    • Windows Server 2016 (Server Core installation) 10.0.14393.9612

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Hardened ImagesFixed RHSA-2026:84693
Not affected: 1 product
  • Red Hat Hardened Images

Microsoft

Microsoft's page for this CVE →

Impact
Remote Code Execution
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely
ProductStatusPlan or fix
.NET 11.0 runtime installed on WindowsFixed 11.0.0-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-2026-70007
  2. 2026-10-13 Alias added: GHSA-pfwj-2f93-rf42
  3. 2026-10-13 Fix available: NuGet/[email protected], NuGet/[email protected], NuGet/[email protected] +9 · GHSA-pfwj-2f93-rf42
  4. 2026-10-13 CVSS score added · GHSA-pfwj-2f93-rf42
  5. 2026-10-13 Weakness changed · GHSA-pfwj-2f93-rf42
  6. 2026-10-13 4 new references · GHSA-pfwj-2f93-rf42
  7. 2026-10-13 CISA SSVC decision points changed
  8. 2026-10-14 Priority changed: MEDIUM → LOW
  9. 2026-10-14 CISA SSVC decision points changed
  10. 2026-10-14 Priority changed: LOW → MEDIUM
  11. 2026-10-20 2 new references · GHSA-pfwj-2f93-rf42
  12. 2026-10-20 Fix available: RHSA-2026:84693 · Red Hat
  13. 2026-10-20 Fix available: Red Hat Hardened Images · Red Hat
  14. 2026-10-20 CVSS score added · Red Hat
  15. 2026-10-23 Fix available: Microsoft/.NET 10.0 [email protected], Microsoft/.NET 11.0 [email protected], Microsoft/.NET 8.0 [email protected] +1 · CNA
  16. 2026-10-24 EPSS moved to the 50th–90th percentile
  17. 2026-10-27 Fix available: KB5126868, KB5127660, KB5127664 +19 · Microsoft

References

Patch 1

Advisory 1

Other 4

  • 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