CVE-2025-21413
Published: 14 January 2025
Summary
CVE-2025-21413 is a high-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Microsoft Windows 10 1507. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Client Execution (T1203); ranked in the top 7.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Deeper analysis
Windows Telephony Service contains a remote code execution vulnerability tracked as CVE-2025-21413. The flaw affects the Telephony service component in Windows and carries a CVSS 3.1 score of 8.8, reflecting network attack vector, low attack complexity, no required privileges, and required user interaction. The weakness is categorized under CWE-122.
An unauthenticated remote attacker can exploit the issue by convincing a user to interact with specially crafted content, resulting in arbitrary code execution with the privileges of the Telephony service. Successful exploitation grants the attacker the ability to execute code, access sensitive information, and perform other actions on the affected system.
The single reference points to the Microsoft Security Response Center advisory for CVE-2025-21413, which is the authoritative source for patch availability and mitigation guidance. The associated EPSS score has remained flat at 0.0813 with no material increase observed after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-2472
Vulnerability details
Windows Telephony Service Remote Code Execution Vulnerability
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
RCE vulnerability with network vector and required user interaction directly enables T1203 (Exploitation for Client Execution); arbitrary code execution facilitates T1059.003 (Windows Command Shell).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Timely flaw remediation through vendor patching directly eliminates the heap-based buffer overflow vulnerability in Windows Telephony Service.
Memory protection mechanisms like DEP and ASLR prevent arbitrary code execution from the heap buffer overflow exploitation in Windows Telephony Service.
Information input validation ensures telephony service inputs do not exceed buffer capacities, directly countering the CWE-122 heap overflow.