CVE tracker / CVE-2026-83706
CVE-2026-83706
CVE-2026-83706 is the Windows NTFS Elevation of Privilege Vulnerability. Microsoft rates it Important, CVSS 6.7. It is not in CISA's Known Exploited Vulnerabilities catalog. Published October 13, 2026.
Risk summary
MediumElevation of Privilege
6.7
CVSS v3 base
0.4%
EPSS: chance of exploitation in 30 days
Medium
Severity
Important
Microsoft's rating
Less Likely
Microsoft: exploitation
No
In CISA KEV
Microsoft describes it: “Use after free in Windows NTFS allows an authorized attacker to elevate privileges locally.”
How to fix it
Microsoft lists 8 affected products and the update that fixes each:
- KB5122871 · fixed build 10.0.26100.33438
Windows Server 2025, Windows Server 2025 (Server Core installation) - KB5124008 · fixed build 10.0.26100.9445, 10.0.26200.9445
Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems - KB5124012 · fixed build 10.0.28000.2954
Windows 11 version 26H1 for x64-based Systems, Windows 11 Version 26H1 for ARM64-based Systems
What Microsoft changed
- October 13, 2026: Information published.
Details
- Weakness
- CWE-416: Use After Free
- Publicly disclosed (Microsoft)
- No
- Exploited (Microsoft)
- No
- Known exploited (CISA KEV)
- Not listed
- Published
- October 13, 2026
- Last revised
- October 13, 2026
Get told when this changes
Senserva Watch emails Microsoft security and patch alerts when something moves: a new exploitation report, a revised fix, a known issue. Free, one email address.
References
From Microsoft, CISA, NVD and FIRST data; the Microsoft details were read when this page was opened. Check the references above before you act.