CVE-2025-21241
Published: 14 January 2025
Summary
CVE-2025-21241 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 24.2% 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
Requires timely remediation of the specific Remote Code Execution flaw in Windows Telephony Service via patching.
Implements memory protections such as ASLR and DEP that directly mitigate buffer overflow (CWE-122) exploitation leading to RCE.
Minimizes attack surface by disabling the unnecessary Windows Telephony Service, preventing remote exploitation opportunities.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
RCE in Windows Telephony Service (remote, unauthenticated, network-accessible) directly maps to exploitation of remote services (T1210) and enables arbitrary command/script execution (T1059).
NVD Description
Windows Telephony Service Remote Code Execution Vulnerability
Deeper analysisAI
CVE-2025-21241 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 associated with CWE-122 and NVD-CWE-noinfo.
The vulnerability can be exploited by a remote attacker requiring no privileges, though it demands user interaction and features low attack complexity. Successful exploitation enables the attacker to execute arbitrary code, resulting in high impacts to confidentiality, integrity, and availability within the affected system's scope.
Microsoft's update guide provides details on mitigation, available at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21241.
Details
- CWE(s)