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TI-2026-73360 Aliases CVE-2026-105016GHSA-5gjq-3f94-rcf7

Heap overflow in Microsoft QUIC enables remote code execution

Priority MEDIUM 52CWE-122Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
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 and GitHub. Impact type from CWE-122 and the CVSS impact.

Summary

Microsoft QUIC in several Microsoft products, including .NET runtimes, Visual Studio and Windows, contains a heap-based buffer overflow (CWE-122). An unauthorized remote attacker can execute code over the network without privileges or user interaction.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01658 76th percentileScored 2026-11-07
Fix Fixed .NET 10.0 runtime (Microsoft): 10.0.14.NET 11.0 runtime (Microsoft): 11.0.0-rc.2.26504.105+14 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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 10.0.1410.0.14Patch availableCNA
Microsoft.NET 11.0 runtime11.0.0 to before 11.0.0-rc.2.26504.10511.0.0-rc.2.26504.105Patch 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 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
MicrosoftWindows 11 version 23H210.0.22631.0 to before 10.0.22631.765210.0.22631.7652Patch availableCNA
MicrosoftWindows 11 Version 23H210.0.22631.0 to before 10.0.22631.765210.0.22631.7652Patch availableCNA
MicrosoftWindows 11 Version 24H210.0.26100.0 to before 10.0.26100.971110.0.26100.9711Patch availableCNA
MicrosoftWindows 11 Version 25H210.0.26200.0 to before 10.0.26200.971110.0.26200.9711Patch availableCNA
MicrosoftWindows 11 version 26H110.0.28000.0 to before 10.0.28000.323110.0.28000.3231Patch availableCNA
MicrosoftWindows 11 Version 26H210.0.26300.0 to before 10.0.26300.971110.0.26300.9711Patch availableCNA
MicrosoftWindows Server 202210.0.20348.0 to before 10.0.20348.576110.0.20348.5761Patch availableCNA
MicrosoftWindows Server 202510.0.26100.0 to before 10.0.26100.3365010.0.26100.33650Patch availableCNA
MicrosoftWindows Server 2025 (Server Core installation)10.0.26100.0 to before 10.0.26100.3365010.0.26100.33650Patch availableCNA
—Microsoft.Native.Quic.MsQuic.Schannel (NuGet)2.5.11-ci.156755675 to before 2.5.11-ci.1594170532.5.11-ci.159417053Patch availableGHSA-5gjq-3f94-rcf7
  • .NET 10.0 runtime VendorMicrosoft Affected 10.0.0 to before 10.0.14 Fixed in 10.0.14 Patch available CNA
  • .NET 11.0 runtime VendorMicrosoft Affected 11.0.0 to before 11.0.0-rc.2.26504.105 Fixed in 11.0.0-rc.2.26504.105 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 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
  • Windows 11 version 23H2 VendorMicrosoft Affected 10.0.22631.0 to before 10.0.22631.7652 Fixed in 10.0.22631.7652 Patch available CNA
  • Windows 11 Version 23H2 VendorMicrosoft Affected 10.0.22631.0 to before 10.0.22631.7652 Fixed in 10.0.22631.7652 Patch available CNA
  • Windows 11 Version 24H2 VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.9711 Fixed in 10.0.26100.9711 Patch available CNA
  • Windows 11 Version 25H2 VendorMicrosoft Affected 10.0.26200.0 to before 10.0.26200.9711 Fixed in 10.0.26200.9711 Patch available CNA
  • Windows 11 version 26H1 VendorMicrosoft Affected 10.0.28000.0 to before 10.0.28000.3231 Fixed in 10.0.28000.3231 Patch available CNA
  • Windows 11 Version 26H2 VendorMicrosoft Affected 10.0.26300.0 to before 10.0.26300.9711 Fixed in 10.0.26300.9711 Patch available CNA
  • Windows Server 2022 VendorMicrosoft Affected 10.0.20348.0 to before 10.0.20348.5761 Fixed in 10.0.20348.5761 Patch available CNA
  • Windows Server 2025 VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.33650 Fixed in 10.0.26100.33650 Patch available CNA
  • Windows Server 2025 (Server Core installation) VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.33650 Fixed in 10.0.26100.33650 Patch available CNA
  • Microsoft.Native.Quic.MsQuic.Schannel (NuGet) Vendor— Affected 2.5.11-ci.156755675 to before 2.5.11-ci.159417053 Fixed in 2.5.11-ci.159417053 Patch available GHSA-5gjq-3f94-rcf7

CPE names Threatist (inferred) · 3

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*——Microsoft
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:*:*——Microsoft
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*——Microsoft
  • cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:* Versions — — ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:*:* Versions — — ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* Versions — — ·Microsoft

Remediation

Apply the fixed versions: .NET 8.0 runtime 8.0.32, .NET 9.0 runtime 9.0.21, .NET 10.0 runtime 10.0.14, .NET 11.0 runtime 11.0.0-rc.2.26504.105, Microsoft Visual Studio 2022 version 17.14 in 17.14.42, Microsoft Visual Studio 2026 version 18.10 in 18.10.4, Windows 11 version 23H2 in 10.0.22631.7652, Windows 11 Version 24H2 in 10.0.26100.9711, Windows 11 Version 25H2 in 10.0.26200.9711, Windows 11 version 26H1 in 10.0.28000.3231, Windows 11 Version 26H2 in 10.0.26300.9711, Windows Server 2022 in 10.0.20348.5761 and Windows Server 2025 (including Server Core installation) in 10.0.26100.33650.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA .NET 10.0 runtime (Microsoft) Fixed in 10.0.14
  • Fix · CNA .NET 11.0 runtime (Microsoft) Fixed in 11.0.0-rc.2.26504.105
  • Fix · CNA .NET 8.0 runtime (Microsoft) Fixed in 8.0.32
  • Fix · CNA .NET 9.0 runtime (Microsoft) Fixed in 9.0.21
  • Fix · CNA Microsoft Visual Studio 2022 version 17.14 (Microsoft) Fixed in 17.14.42
  • Fix · CNA Microsoft Visual Studio 2026 version 18.10 (Microsoft) Fixed in 18.10.4
  • Fix · CNA Windows 11 version 23H2 (Microsoft) Fixed in 10.0.22631.7652
  • Fix · CNA Windows 11 Version 23H2 (Microsoft) Fixed in 10.0.22631.7652
  • Fix · CNA Windows 11 Version 24H2 (Microsoft) Fixed in 10.0.26100.9711
  • Fix · CNA Windows 11 Version 25H2 (Microsoft) Fixed in 10.0.26200.9711
  • Fix · CNA Windows 11 version 26H1 (Microsoft) Fixed in 10.0.28000.3231
  • Fix · CNA Windows 11 Version 26H2 (Microsoft) Fixed in 10.0.26300.9711
  • Fix · CNA Windows Server 2022 (Microsoft) Fixed in 10.0.20348.5761
  • Fix · CNA Windows Server 2025 (Microsoft) Fixed in 10.0.26100.33650
  • Fix · CNA Windows Server 2025 (Server Core installation) (Microsoft) Fixed in 10.0.26100.33650
  • Fix · GHSA-5gjq-3f94-rcf7 Microsoft.Native.Quic.MsQuic.Schannel (NuGet) Fixed in 2.5.11-ci.159417053 Advisory →

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-105016
  2. 2026-10-13 CISA SSVC decision points changed
  3. 2026-10-13 Alias added: GHSA-5gjq-3f94-rcf7
  4. 2026-10-13 Fix available: NuGet/[email protected] · GHSA-5gjq-3f94-rcf7
  5. 2026-10-13 CVSS score added · GHSA-5gjq-3f94-rcf7
  6. 2026-10-13 Weakness changed · GHSA-5gjq-3f94-rcf7
  7. 2026-10-13 4 new references · GHSA-5gjq-3f94-rcf7
  8. 2026-10-16 CISA SSVC decision points changed
  9. 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

References

Patch 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