Severity
High
Analysis Summary
CVE-2025-21200 CVSS:8.8
Microsoft Windows could allow a remote attacker to execute arbitrary code on the system, caused by a heap-based buffer overflow in the Telephony Service component.
CVE-2025-21190 CVSS:8.8
Microsoft Windows could allow a remote attacker to execute arbitrary code on the system, caused by a heap-based buffer overflow in the Telephony Service component.
Impact
- Code Execution
Indicators of Compromise
CVE
CVE-2025-21200
CVE-2025-21190
Affected Vendors
- Microsoft
Affected Products
- Microsoft Windows Server 2022
- Microsoft Windows 10 Version 1809 - 10.0.17763.0
- Microsoft Windows Server 2019 - 10.0.17763.0
- Microsoft Windows 11 version 22H3 - 10.0.22631.0
- Microsoft Windows Server 2012 R2 - 6.3.9600.0
- Microsoft Windows Server 2012 R2 (Server Core installation) - 6.3.9600.0
- Microsoft Windows 11 Version 23H2 - 10.0.22631.0
- Microsoft Windows 11 Version 24H2 - 10.0.26100.0
- Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) - 6.0.6003.0
- Microsoft Windows Server 2008 Service Pack 2 - 6.0.6003.0
- Microsoft Windows Server 2025 - 10.0.26100.0
- Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) - 6.1.7601.0
Remediation
Use Microsoft Automatic Update to apply the appropriate patch for your system, or the Microsoft Security Update Guide to search for available patches.