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TI-2026-73353 Aliases CVE-2026-105005GHSA-cmg6-qx67-w59c

Out-of-bounds write in Windows Schannel allows remote code execution

Priority LOW 39CWE-787Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

Microsoft Windows 11 version 26H1 from 10.0.28000.0 before 10.0.28000.3231 is affected. An out-of-bounds write in Windows Schannel (CWE-787) lets an unauthorized attacker execute code over a network. The CVSS vector indicates high attack complexity and no privileges or user interaction required.

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

Description from the CNA

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00747 55th percentileScored 2026-11-07
Fix Fixed Windows 11 version 26H1 (Microsoft): 10.0.28000.3231

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
MicrosoftWindows 11 version 26H110.0.28000.0 to before 10.0.28000.323110.0.28000.3231Patch availableCNA
  • 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

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*before 10.0.28000.3231VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*before 10.0.28000.3231VulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:* Versions before 10.0.28000.3231 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:* Versions before 10.0.28000.3231 Vulnerable ·Microsoft

Remediation

Microsoft Windows 11 version 26H1 is fixed in 10.0.28000.3231.

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

  • Fix · CNA Windows 11 version 26H1 (Microsoft) Fixed in 10.0.28000.3231

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-105005
  2. 2026-10-13 CISA SSVC decision points changed
  3. 2026-10-13 Priority changed: MEDIUM → LOW
  4. 2026-10-13 Alias added: GHSA-cmg6-qx67-w59c

References

Patch 1

  • TI-2026-26194 Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-73128 Windows Shell Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2026-56567 Windows Update Stack Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 7.8
  • TI-2026-48395 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 7.0
  • TI-2026-24734 Windows Shell Spoofing Vulnerability KEVCVSS 3.1MEDIUM 4.3
  • TI-2026-36364 HTTP.sys Denial of Service Vulnerability CVSS 3.1HIGH 7.5
See all 2533 →

Sources

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