CVE-2025-21306
Published: 14 January 2025
Summary
CVE-2025-21306 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 CM-7 (Least Functionality) and SI-2 (Flaw Remediation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly mitigates CVE-2025-21306 by requiring timely patching of the Windows Telephony Service vulnerability as detailed in Microsoft's update guide.
Prevents exploitation by configuring systems to disable or restrict the unnecessary Windows Telephony Service, reducing the attack surface for this RCE vulnerability.
Identifies systems vulnerable to CVE-2025-21306 through vulnerability scanning, enabling prioritization of remediation efforts.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
The CVE describes a remote code execution vulnerability in the Windows Telephony Service exploitable by an unauthenticated network attacker, directly mapping to exploitation of remote services for code execution on the target system.
NVD Description
Windows Telephony Service Remote Code Execution Vulnerability
Deeper analysisAI
CVE-2025-21306 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 an unauthenticated attacker over the network with low attack complexity, though it requires user interaction. Successful exploitation grants high-impact remote code execution, compromising confidentiality, integrity, and availability on the affected system.
Microsoft's Security Response Center update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21306 details available patches and mitigation strategies.
Details
- CWE(s)