CVE-2025-21205: Windows Telephony Service Remote Code Execution Vulnerability
First published: Tue Apr 08 2025(Updated: )
<p>Heap-based buffer overflow in Windows Telephony Service allows an unauthorized attacker to execute code over a network.</p>
Credit: secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Windows 10 | =1809 | |
| Windows 10 | =1607 | |
| Windows 11 | =23H2 | |
| Windows 11 | =24H2 | |
| Microsoft Windows Server 2022 23H2 | ||
| Windows 11 | =24H2 | |
| Microsoft Windows Server 2022 | ||
| Microsoft Windows Server 2008 R2 | ||
| Windows 10 | =21H2 | |
| Windows 10 | =22H2 | |
| Microsoft Windows Server | ||
| Windows 10 | =22H2 | |
| Windows 11 | =22H2 | |
| Microsoft Windows Server 2025 | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server 2012 R2 | ||
| Microsoft Windows Server 2019 | ||
| Windows 10 | =21H2 | |
| Microsoft Windows Server | ||
| Windows 10 | =1607 | |
| Microsoft Windows Server 2008 R2 | ||
| Windows 11 | =23H2 | |
| Microsoft Windows Server 2019 | ||
| Microsoft Windows Server 2025 | ||
| Windows 10 | =21H2 | |
| Microsoft Windows Server | ||
| Windows 10 | =22H2 | |
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server 2012 R2 | ||
| Microsoft Windows Server | ||
| Windows 11 | =22H2 | |
| Microsoft Windows Server 2022 | ||
| Windows 10 | =1809 | |
| Windows 10 | ||
| Windows 10 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2025-21205?
CVE-2025-21205 is classified as a critical vulnerability due to its potential to allow unauthorized remote code execution.
How do I fix CVE-2025-21205?
To fix CVE-2025-21205, apply the latest security updates provided by Microsoft for affected Windows products.
Which versions of Windows are affected by CVE-2025-21205?
CVE-2025-21205 affects several versions of Windows, including Windows 10, Windows 11, and Windows Server 2022.
What type of vulnerability is CVE-2025-21205?
CVE-2025-21205 is a heap-based buffer overflow vulnerability found in the Windows Telephony Service.
Can CVE-2025-21205 be exploited over the network?
Yes, an unauthorized attacker can exploit CVE-2025-21205 over a network to execute code on the affected system.
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