CVE-2025-21252
Published: 14 January 2025
Summary
CVE-2025-21252 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 of Remote Services (T1210); ranked in the top 17.8% 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
Timely remediation of identified flaws, including applying Microsoft patches for CVE-2025-21252, directly eliminates the buffer overflow vulnerability in Windows Telephony Service.
Memory protection mechanisms such as DEP, ASLR, and stack canaries directly mitigate exploitation of the stack-based buffer overflow (CWE-122) leading to remote code execution.
Malicious code protection scans for and blocks exploit payloads that attempt arbitrary code execution via the Windows Telephony Service vulnerability.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
RCE in Windows Telephony Service with network vector directly enables exploitation of remote services for code execution.
NVD Description
Windows Telephony Service Remote Code Execution Vulnerability
Deeper analysisAI
CVE-2025-21252 is a Remote Code Execution vulnerability in 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 linked to CWE-122, with additional NVD-CWE-noinfo classification.
The vulnerability can be exploited by a remote unauthenticated attacker over the network with low attack complexity, though it requires user interaction. Successful exploitation enables high-impact effects on confidentiality, integrity, and availability, allowing arbitrary code execution on the targeted Windows system.
Mitigation details are available in the Microsoft Security Response Center update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21252.
Details
- CWE(s)