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TI-2026-72499 Aliases CVE-2026-83720GHSA-fjfx-pc2m-m679

Windows Kerberos Elevation of Privilege Vulnerability

Priority LOW 33CWE-416Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
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-416 and the CVSS impact.

Summary

Microsoft Windows 11 version 26H1 from 10.0.28000.0 before 10.0.28000.3231 is affected. A use after free flaw (CWE-416) in Windows Kerberos allows an authorized attacker to escalate privileges locally. The CVSS vector gives local attack vector, high attack complexity and low privileges required.

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

Description from the CNA

Use after free in Windows Kerberos allows an authorized attacker to elevate privileges locally.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00279 20th 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-2026-83720
  2. 2026-10-13 Alias added: GHSA-fjfx-pc2m-m679

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