CVE-2025-21222: 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 11 | =22H2 | |
| Microsoft Windows Server 2016 | ||
| Windows 10 | =21H2 | |
| Microsoft Windows Server 2025 | ||
| Windows 11 | =24H2 | |
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Windows 11 | =24H2 | |
| Microsoft Windows Server 2019 | ||
| Microsoft Windows Server 2008 R2 | ||
| Microsoft Windows Server 2012 R2 | ||
| Windows 10 | =21H2 | |
| Windows 11 | =23H2 | |
| Microsoft Windows Server 2025 | ||
| Windows 10 | =22H2 | |
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server 2022 | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server 2008 R2 | ||
| Windows 10 | =1607 | |
| Windows 10 | =22H2 | |
| Microsoft Windows Server | ||
| Microsoft Windows Server 2012 R2 | ||
| Windows 11 | =23H2 | |
| Microsoft Windows Server 2019 | ||
| Microsoft Windows Server 2022 23H2 | ||
| Microsoft Windows Server | ||
| Windows 10 | =22H2 | |
| Windows 10 | =21H2 | |
| Windows 11 | =22H2 | |
| Windows 10 | =1809 | |
| Microsoft Windows Server 2022 | ||
| Windows 10 | =1607 | |
| Microsoft Windows Server | ||
| Windows 10 | =1809 | |
| Windows 10 | ||
| Windows 10 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2025-21222?
CVE-2025-21222 is classified as a critical vulnerability due to the potential for remote code execution.
How does CVE-2025-21222 affect the system?
CVE-2025-21222 allows an unauthorized attacker to exploit a heap-based buffer overflow in the Windows Telephony Service.
How do I fix CVE-2025-21222?
To fix CVE-2025-21222, users should apply the latest security patches provided by Microsoft.
What systems are impacted by CVE-2025-21222?
CVE-2025-21222 affects multiple versions of Microsoft Windows, including Windows 10 and Windows Server 2022.
Can CVE-2025-21222 be exploited remotely?
Yes, CVE-2025-21222 can be exploited remotely, allowing attackers to execute code over a network.
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- canonical/windows 10
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- version/windows 11/22h2
- canonical/microsoft windows server 2016
- version/windows 10/21h2
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- version/windows 11/24h2
- canonical/microsoft windows server
- canonical/microsoft windows server 2008 r2
- canonical/microsoft windows server 2019
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- version/windows 10/1607
- canonical/microsoft windows server 2022 23h2
- version/windows 10/1809