Heap-based buffer overflow in Microsoft Windows and Windows Server - CVE-2025-59255
Published: October 15, 2025
Vulnerability identifier: #VU117198
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-59255
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in Windows DWM Core Library. A local user can pass specially crafted data to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system with elevated privileges.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2025-59255
Install updates from vendor's website.
Microsoft Windows - addressed in versions 10 21H2 10.0.19044.6456, 10 22H2 10.0.19045.6456, 10 1607 10.0.14393.8519, 10 1809 10.0.17763.7919, 11 22H2 10.0.22621.6060, 11 23H2 10.0.22631.6060, 11 24H2 10.0.26100.6899
Windows Server - addressed in versions 2012 R2 6.3.9600.22824, 2019 10.0.17763.7919, 2022 23H2 10.0.25398.1913, 2022 10.0.20348.4294, 2025 10.0.26100.6899
Windows Server - addressed in versions 2012 R2 6.3.9600.22824, 2019 10.0.17763.7919, 2022 23H2 10.0.25398.1913, 2022 10.0.20348.4294, 2025 10.0.26100.6899