Privilege escalation in Microsoft Kernel Streaming WOW Thunk Service Driver



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2025-49675
CWE-ID CWE-416
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Windows
Operating systems & Components / Operating system

Windows Server
Operating systems & Components / Operating system

Vendor Microsoft

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Use-after-free

EUVDB-ID: #VU112595

Risk: Low

CVSSv4.0: 5.9 [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/E:U/U:Clear]

CVE-ID: CVE-2025-49675

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in Kernel Streaming WOW Thunk Service Driver. A local user can gain elevated privileges on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 10 21H2 10.0.19041.3920 - 11 24H2 10.0.26100.4349

Windows Server: 2008 6.0.6003.22567 - 2025 10.0.26100.4349

CPE2.3 External links

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49675


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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