Disclosure summary
Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to execute code over a network.
Source-reported weakness categories
CWE-416
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
Microsoft Security Updates (CVRF) · 2026-Jan
Open original source · Updated Jan 13, 2026
Windows Local Security Authority Subsystem Service (LSASS) Remote Code Execution Vulnerability
Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.
Microsoft maximum product score: 7.5
| Vendor | Product / association | Version / bounds |
|---|---|---|
| Microsoft update guide | Windows Server 2025 (Server Core installation) | (MSRC status code 3) |
| Microsoft update guide | Windows 11 Version 25H2 for ARM64-based Systems | (MSRC status code 3) |
| Microsoft update guide | Windows 11 Version 25H2 for x64-based Systems | (MSRC status code 3) |
| Microsoft update guide | Windows 11 Version 24H2 for ARM64-based Systems | (MSRC status code 3) |
| Microsoft update guide | Windows 11 Version 24H2 for x64-based Systems | (MSRC status code 3) |
| Microsoft update guide | Windows Server 2025 | (MSRC status code 3) |
Vendor remediation references
- 5073379 · build 10.0.26100.32230 · product IDs 12437, 12436
- Vendor guidance · product IDs 12437, 12436
- 5073379 · product IDs 12437, 12436
- 5074109 · build 10.0.26200.7623 · product IDs 20437, 20438
- Vendor guidance · product IDs 20437, 20438
- 5074109 · product IDs 20437, 20438, 12389, 12390
- 5074109 · build 10.0.26100.7623 · product IDs 12389, 12390
- Vendor guidance · product IDs 12389, 12390
Original records & references
- NIST NVD record
- CVE Program record
- msrc.microsoft.com — Vendor advisory
PUBLISHED 2026-01-13T03:00:00-05:00
MODIFIED 2026-01-13T03:00:00-05:00
INGESTED 2026-10-08T12:45:22-04:00