CVE-2025-21244
Published: 14 January 2025
Summary
CVE-2025-21244 is a high-severity Integer Overflow or Wraparound (CWE-190) 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 27.5% 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 integer overflow vulnerability in Windows Telephony Service through timely identification, testing, and application of Microsoft patches.
Implements memory safeguards like ASLR and DEP that disrupt remote code execution exploits targeting the integer overflow even if unpatched.
Restricts system to least functionality by disabling unnecessary Windows Telephony Service, eliminating exposure to remote exploitation.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
RCE in remotely accessible Windows Telephony Service (network vector + UI:R) directly enables exploitation of remote services and client-side execution.
NVD Description
Windows Telephony Service Remote Code Execution Vulnerability
Deeper analysisAI
CVE-2025-21244 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-190 (Integer Overflow or Wraparound) along with NVD-CWE-noinfo.
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 consequences, including unauthorized access to confidential data, modification of system integrity, disruption of availability, and execution of arbitrary code on the affected Windows system.
Microsoft's update guide provides details on mitigation, available at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21244.
Details
- CWE(s)