CVE-2025-21371: Windows Telephony Service Remote Code Execution Vulnerability
First published: Tue Feb 11 2025(Updated: )
Windows Telephony Service Remote Code Execution Vulnerability
Credit: secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft Windows Server 2012 R2 | ||
| Microsoft Windows Server 2022 23H2 | ||
| Microsoft Windows Server 2025 | ||
| Microsoft Windows Server 2012 R2 | ||
| Microsoft Windows Server 2025 | ||
| Microsoft Windows Server 2008 R2 | ||
| Microsoft Windows Server 2008 R2 | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server 2019 | ||
| Microsoft Windows Server 2019 | ||
| Windows 11 | =23H2 | |
| Windows 11 | =22H2 | |
| Windows 11 | =22H2 | |
| Windows 11 | =24H2 | |
| Windows 11 | =24H2 | |
| Windows 11 | =23H2 | |
| Microsoft Windows Server 2022 | ||
| Microsoft Windows Server 2022 | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server 2016 | ||
| Microsoft Windows 10 | <10.0.10240.20915 | |
| Microsoft Windows 10 | <10.0.10240.20915 | |
| Microsoft Windows 10 | <10.0.14393.7785 | |
| Microsoft Windows 10 | <10.0.14393.7785 | |
| Microsoft Windows 10 | <10.0.17763.6893 | |
| Microsoft Windows 10 | <10.0.17763.6893 | |
| Microsoft Windows 10 | <10.0.19044.5487 | |
| Microsoft Windows 10 | <10.0.19045.5487 | |
| Windows 11 | <10.0.22621.4890 | |
| Windows 11 | <10.0.22631.4890 | |
| Windows 11 | <10.0.26100.3194 | |
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | =r2-sp1 | |
| Microsoft Windows Server | ||
| Microsoft Windows Server | =r2 | |
| Microsoft Windows Server 2016 | <10.0.14393.7785 | |
| Microsoft Windows Server 2019 | <10.0.17763.6893 | |
| Microsoft Windows Server 2022 | <10.0.20348.3207 | |
| Microsoft Windows Server 2022 | <10.0.25398.1425 | |
| Microsoft Windows Server 2025 | <10.0.26100.3194 | |
| Windows 10 | =1809 | |
| Windows 10 | =1809 | |
| Windows 10 | =22H2 | |
| Windows 10 | =22H2 | |
| Windows 10 | =22H2 | |
| Windows 10 | =1607 | |
| Windows 10 | =1607 | |
| Windows 10 | =21H2 | |
| Windows 10 | =21H2 | |
| Windows 10 | =21H2 | |
| Windows 10 | ||
| Windows 10 |
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Reference Links
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21371 (Advisory)
- https://www.vicarius.io/vsociety/posts/windows-telephony-service-remote-code-execution-vulnerability-detection-script
- https://www.vicarius.io/vsociety/posts/windows-telephony-service-remote-code-execution-vulnerability-mitigation-script
Frequently Asked Questions
What is the severity of CVE-2025-21371?
CVE-2025-21371 has been rated as critical due to its potential to allow remote code execution.
How do I fix CVE-2025-21371?
To fix CVE-2025-21371, apply the relevant security patches provided by Microsoft for your affected Windows version.
What systems are affected by CVE-2025-21371?
CVE-2025-21371 affects multiple Microsoft Windows products including Windows 10, Windows 11, Windows Server 2022, and others.
Is CVE-2025-21371 exploitable remotely?
Yes, CVE-2025-21371 is an exploit that can be triggered remotely by attackers.
What types of attacks can CVE-2025-21371 facilitate?
CVE-2025-21371 can facilitate remote code execution attacks, allowing attackers to execute arbitrary code on affected systems.
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