Vulnerability · Published May 12, 2026 · Assigned by microsoft
CVE-2026-41095Data Deduplication Elevation of Privilege Vulnerability
High 7.8
In plain English
A high-severity use-after-free in Windows Server 2012 R2 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.3%top 73.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Use after free in Data Deduplication allows an authorized attacker to elevate privileges locally.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows Server 2012 R2 | 6.3.9600.0 – before 6.3.9600.23181 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0 – before 6.3.9600.23181 |
| Microsoft | Windows Server 2016 | 10.0.14393.0 – before 10.0.14393.9140 |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 – before 10.0.14393.9140 |
| Microsoft | Windows Server 2019 | 10.0.17763.0 – before 10.0.17763.8755 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 – before 10.0.17763.8755 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 – before 10.0.20348.5139 |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 – before 10.0.25398.2330 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 – before 10.0.26100.32860 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 – before 10.0.26100.32860 |
Weakness: CWE-416 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
References
- Data Deduplication Elevation of Privilege Vulnerability vendor-advisory, patch