CVE-2025-21302
Published: 14 January 2025
Summary
CVE-2025-21302 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 20.8% 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-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 remote code execution vulnerability in Windows Telephony Service by applying timely vendor patches as published by Microsoft.
Provides memory protection mechanisms like DEP and ASLR that defend against heap-based buffer overflow (CWE-122) exploitation in the telephony service.
Enforces input validation for data processed by the Windows Telephony Service, mitigating buffer overflow conditions triggered by unauthenticated remote inputs requiring user interaction.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
The CVE is a remote code execution vulnerability in Windows Telephony Service with AV:N, PR:N, and UI:R, directly enabling exploitation for client execution (T1203) and facilitating arbitrary command/script execution (T1059) upon successful exploitation.
NVD Description
Windows Telephony Service Remote Code Execution Vulnerability
Deeper analysisAI
CVE-2025-21302 is a remote code execution vulnerability affecting the Windows Telephony Service. Published on 2025-01-14, 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-122 as well as NVD-CWE-noinfo.
The vulnerability can be exploited by an unauthenticated attacker over the network with low attack complexity, though it requires user interaction. Successful exploitation enables high-impact consequences, including unauthorized access to confidential data, modification of system integrity, and disruption of availability through arbitrary code execution.
Microsoft provides mitigation guidance in its Security Response Center update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21302.
Details
- CWE(s)