CVE-2026-69775Important
Windows DWM Core Library Elevation of Privilege Vulnerability
Assessment
Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges over a network.
- Severity
- Important
- CVSS base score
- 7.1CVSS:3.1/
AV:N/ AC:H/ PR:L/ UI:R/ S:U/ C:H/ I:H/ A:H/ E:U/ RL:O/ RC:C - Impact
- Elevation of Privilege
- EPSS, next 30 days
- 0.6%Higher than 45% of scored CVEs · FIRST model run 26 Sep 2026 · about EPSS
- Exploitability
- Exploitation Less Likely
- Publicly disclosed
- No
- Customer action
- Required: apply the update
- Component
- Windows DWM Core Library
- Weakness
- CWE-416: Use After Free
- Issued by
- Microsoft
- Published
- 8 Sep 2026 · September 2026
- Last revised
- 8 Sep 2026
Updates that fix it
2 KBs| KB | Type | Restart | Applies to | Other CVEs |
|---|---|---|---|---|
| KB5122871 | Security Update | Required | Windows Server 2025, Windows Server 2025 (Server Core installation) | All CVEs in KB5122871 |
| KB5122880 | Security Update | Required | Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems | All CVEs in KB5122880 |
Affected products
Windows4 affected products
- Windows 11 Version 23H2 for ARM64-based Systems
- Windows 11 Version 23H2 for x64-based Systems
- Windows Server 2025
- Windows Server 2025 (Server Core installation)