.NET Denial of Service Vulnerability
CVE-2026-120796
Summary
Use after free in Data Deduplication allows an authorized attacker to elevate privileges locally.
Products covered
Windows Server 2025 (Server Core installation)
Windows Server 2019 (Server Core installation)
Windows Server 2022, 23H2 Edition (Server Core installation)
Windows Server 2025
Windows Server 2016
Windows Server 2016 (Server Core installation)
Windows Server 2012 R2
Windows Server 2022 (Server Core installation)
Show 3 more products
Windows Server 2012 R2 (Server Core installation)
Windows Server 2022
Windows Server 2019
Remediation
Install KB5087539. Install KB5087423. Install KB5087538. Install KB5087541. Install KB5087537. Install KB5087471. Install KB5087545. Install KB5087424.
Vendor-listed fixes
10.0.26100.32860
10.0.26100.32772
10.0.17763.8755
10.0.25398.2330
10.0.14393.9140
6.3.9600.23181
10.0.20348.5139
10.0.20348.5074
CVEs in this advisory 1
Updates
- Published by Microsoft Security Response Center
The publication date reported by the vendor.
- Added to SecurityAlert
We collected the advisory from the official source.
- Confirmed at the source
Our collector saw this advisory during a later source check.