Cloud Vulnerability DB
An open project to list all known cloud vulnerabilities and Cloud Service Provider security issues
Vulnerability DatabaseCVE-2025-21409
CVE-2025-21409:
vulnerability analysis and mitigation
Overview
CVE-2025-21409 is a Windows Telephony Service Remote Code Execution Vulnerability that was discovered and disclosed on January 14, 2025. The vulnerability affects multiple Microsoft Windows operating systems including Windows 10, Windows 11, and various Windows Server versions from 2008 to 2025 (NVD).
Technical details
The vulnerability has been assigned a CVSS v3.1 base score of 8.8 (HIGH) with the following vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. Microsoft has classified this as a heap-based buffer overflow vulnerability (CWE-122) (NVD).
Impact
This vulnerability could allow an attacker to execute remote code on affected systems, potentially gaining the same level of access as the compromised user. The high CVSS score indicates that successful exploitation could lead to complete compromise of system confidentiality, integrity, and availability (Rapid7).
Mitigation and workarounds
Microsoft has released security updates to address this vulnerability across all affected systems. Users are advised to apply the relevant patches including KB5050013 for Windows 10 1507, KB5049993 for Windows 10 1607, and various other KB articles for different Windows versions (FortiGuard).
Additional resources
Source: This report was generated using AI
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