CVE-2025-21201
Published: 11 February 2025
Summary
CVE-2025-21201 is a high-severity Double Free (CWE-415) vulnerability in Microsoft Windows Server 2008. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Client Execution (T1203); 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-2 (Flaw Remediation) and RA-5 (Vulnerability Monitoring and Scanning).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Timely remediation of flaws directly prevents exploitation of the RCE vulnerability in Windows Telephony Server by applying Microsoft's available patches.
Vulnerability scanning identifies unpatched Windows Telephony Server components affected by CVE-2025-21201, enabling prioritization for remediation.
System monitoring detects anomalous behavior or indicators of successful RCE exploitation in the Windows Telephony Server process.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
RCE vulnerability with network vector and required user interaction (malicious link/file) directly maps to client-side exploitation for code execution.
NVD Description
Windows Telephony Server Remote Code Execution Vulnerability
Deeper analysisAI
CVE-2025-21201 is a Remote Code Execution vulnerability in the Windows Telephony Server component of Microsoft Windows. 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 associated with CWE-415.
The vulnerability enables remote exploitation over the network with low attack complexity and no required privileges, though it demands user interaction such as clicking a malicious link or file. An attacker who successfully exploits it can achieve high-impact effects on confidentiality, integrity, and availability, including execution of arbitrary code in the context of the affected server process.
Microsoft's Security Response Center update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21201 provides details on mitigation, including available patches and recommended actions for affected systems.
Details
- CWE(s)