Multiple Microsoft Windows Vulnerabilities

Severity

High

Analysis Summary

CVE-2025-21271 CVSS:7.8

Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability.

CVE-2025-21266 CVSS:8.8

Windows Telephony Service Remote Code Execution Vulnerability.

CVE-2025-21252 CVSS:8.8

Windows Telephony Service Remote Code Execution Vulnerability.

CVE-2025-21248 CVSS:8.8

Windows Telephony Service Remote Code Execution Vulnerability.

CVE-2025-21244 CVSS:8.8

Windows Telephony Service Remote Code Execution Vulnerability.

CVE-2025-21243 CVSS:8.8

Windows Telephony Service Remote Code Execution Vulnerability.

CVE-2025-21413 CVSS:8.8

Windows Telephony Service Remote Code Execution Vulnerability.

CVE-2025-21411 CVSS:8.8

Windows Telephony Service Remote Code Execution Vulnerability.

Impact

Privilege Escalation
Code Execution

Indicators of Compromise

CVE

CVE-2025-21271
CVE-2025-21266
CVE-2025-21252
CVE-2025-21248
CVE-2025-21244
CVE-2025-21243
CVE-2025-21413
CVE-2025-21411

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 Server 2019 (Server Core installation) - 10.0.17763.0
Microsoft Windows Server 2022 - 10.0.20348.0
Microsoft Windows Server 2012 (Server Core installation) - 6.2.9200.0
Microsoft Windows Server 2012 R2 - 6.3.9600.0
Microsoft Windows Server 2012 R2 (Server Core installation) - 6.3.9600.0
Microsoft Windows Server 2012 - 6.2.9200.0
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 2016 - 10.0.14393.0
Microsoft Windows Server 2016 (Server Core installation) - 10.0.14393.0

Remediation

Use Microsoft Automatic Update to apply the appropriate patch for your system, or the Microsoft Security Update Guide to search for available patches.