Double free in Microsoft Windows and Windows Server - CVE-2025-59505

Vulnerability identifier: #VU118297

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-2025-59505

CWE-ID: CWE-415

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local userr to escalate privileges on the system.

The vulnerability exists due to a boundary error in Windows Smart Card Reader. A local user can pass specially crafted data to the application, trigger double free error and gain elevated privileges on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Microsoft Windows
Windows Server

Install updates from vendor's website.

Microsoft Windows - addressed in versions 10 21H2 10.0.19044.6575, 10 22H2 10.0.19045.6575, 10 1607 10.0.14393.8594, 10 1809 10.0.17763.8027, 11 23H2 10.0.22631.6199, 11 24H2 10.0.26100.7092, 11 24H2 10.0.26100.7171
Windows Server - addressed in versions 2012 R2 6.3.9600.22869, 2012 6.2.9200.25768, 2016 10.0.14393.8594, 2019 10.0.17763.8027, 2022 23H2 10.0.25398.1965, 2022 10.0.20348.4346, 2022 10.0.20348.4405, 2025 10.0.26100.7092, 2025 10.0.26100.7171

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-59505

• Privilege escalation in Microsoft Windows Smart Card Reader