CVE-2025-27477: 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 |
|---|---|---|
| Microsoft Windows Server | ||
| Microsoft Windows Server 2012 R2 | ||
| Microsoft Windows Server 2008 R2 | ||
| Windows 10 | =22H2 | |
| Microsoft Windows Server | ||
| Microsoft Windows Server 2022 | ||
| Windows 10 | =21H2 | |
| Microsoft Windows Server | ||
| Windows 10 | =1607 | |
| Windows 11 | =24H2 | |
| Windows 10 | =21H2 | |
| Microsoft Windows Server | ||
| Windows 10 | =22H2 | |
| Microsoft Windows Server 2016 | ||
| Windows 10 | =1607 | |
| Windows 11 | =23H2 | |
| Microsoft Windows Server 2019 | ||
| Windows 11 | =22H2 | |
| Microsoft Windows Server | ||
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server 2008 R2 | ||
| Microsoft Windows Server 2025 | ||
| Windows 11 | =24H2 | |
| Windows 10 | =22H2 | |
| Windows 11 | =23H2 | |
| Microsoft Windows Server 2019 | ||
| Microsoft Windows Server 2012 R2 | ||
| Windows 10 | =1809 | |
| Microsoft Windows Server 2025 | ||
| Microsoft Windows Server 2022 23H2 | ||
| Windows 10 | =21H2 | |
| Microsoft Windows Server 2022 | ||
| Windows 11 | =22H2 | |
| Windows 10 | =1809 | |
| Windows 10 | ||
| Windows 10 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2025-27477?
CVE-2025-27477 is classified as a critical vulnerability due to its potential for remote code execution.
How do I fix CVE-2025-27477?
To fix CVE-2025-27477, apply the latest security patches released by Microsoft for affected versions of Windows.
Which software versions are affected by CVE-2025-27477?
CVE-2025-27477 affects various Microsoft Windows versions, including Windows Server 2008, Windows 10, and Windows Server 2022.
What is the impact of exploiting CVE-2025-27477?
Exploiting CVE-2025-27477 may allow an unauthorized attacker to execute arbitrary code on the affected system over a network.
Is there a workaround for CVE-2025-27477?
Currently, the only effective mitigation for CVE-2025-27477 is to apply the provided security updates as soon as possible.
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- canonical/microsoft windows server 2012 r2
- canonical/microsoft windows server 2008 r2
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- canonical/microsoft windows server 2022
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- canonical/microsoft windows server 2016
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- canonical/microsoft windows server 2019
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