CVE-2025-21406
Published: 11 February 2025
Summary
CVE-2025-21406 is a high-severity Use After Free (CWE-416) vulnerability in Microsoft Windows Server 2008. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation of Remote Services (T1210); ranked at the 37.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-16 (Memory Protection) and SI-2 (Flaw Remediation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly remediates the Use After Free vulnerability in Windows Telephony Service by requiring timely application of Microsoft patches.
Implements memory protections such as ASLR and DEP that comprehensively mitigate Use After Free (CWE-416) exploitation leading to remote code execution.
Enables detection of anomalous behavior or remote code execution attempts targeting the Windows Telephony Service over the network.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
The CVE describes a remote code execution vulnerability in the Windows Telephony Service that can be exploited over the network, directly mapping to exploitation of remote services for arbitrary code execution.
NVD Description
Windows Telephony Service Remote Code Execution Vulnerability
Deeper analysisAI
CVE-2025-21406 is a remote code execution vulnerability in the Windows Telephony Service. Published on 2025-02-11, it carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) and is linked to CWE-416 (Use After Free), with additional NVD-CWE-noinfo classification.
A remote unauthenticated attacker can exploit this vulnerability over the network with low attack complexity, though it requires user interaction. Successful exploitation enables high-impact consequences, including unauthorized access to sensitive data, modification of system integrity, and disruption of availability through arbitrary code execution on the affected Windows system.
Microsoft's update guide provides details on mitigation and patches for CVE-2025-21406 at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21406.
Details
- CWE(s)