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TI-2026-26619 Aliases CVE-2026-34332GHSA-qj47-r3gf-wx2h

Windows Kernel-Mode Driver Remote Code Execution Vulnerability

Priority LOW 37CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
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 and Microsoft. Impact type from Microsoft.

Summary

Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to execute code over a network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00511 43rd percentileScored 2026-11-07
Fix Fixed Microsoft: 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
MicrosoftWindows Server 202510.0.26100.0 to before 10.0.26100.3286010.0.26100.32860Patch availableCNA
MicrosoftWindows Server 2025 (Server Core installation)10.0.26100.0 to before 10.0.26100.3286010.0.26100.32860Patch availableCNA
  • Windows Server 2025 VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.32860 Fixed in 10.0.26100.32860 Patch available CNA
  • Windows Server 2025 (Server Core installation) VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.32860 Fixed in 10.0.26100.32860 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*before 10.0.26100.32772VulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* Versions before 10.0.26100.32772 Vulnerable ·Microsoft

Remediation

Microsoft 2 updates

  • KB5087539
    Security Update
    • Windows Server 2025 10.0.26100.32860
    • Windows Server 2025 (Server Core installation) 10.0.26100.32860
  • KB5087423
    Security Hotpatch Update
    • Windows Server 2025 10.0.26100.32772
    • Windows Server 2025 (Server Core installation) 10.0.26100.32772

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Remote Code Execution
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Unlikely

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-34332
  2. 2026-10-03 Alias added: GHSA-qj47-r3gf-wx2h
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Patch 1

  • TI-2026-26194 Windows Internet Key Exchange (IKE) Service Extensions 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-2026-73128 Windows Shell Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2026-17367 MSHTML Framework Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2026-17364 Windows Shell Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2025-24062 Windows SMB Client Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 8.8
See all 3631 →

Sources

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