MSRC compact vulnerability detail

CVE-2025-27481 · Windows Telephony Service Remote Code Execution Vulnerability

Stack-based buffer overflow in Windows Telephony Service allows an unauthorized attacker to execute code over a network.

Severity
Important
Impact
Remote Code Execution
CVSS
8.8 base · 7.7 temporal
Release
2025-04-08
Signals
Windows Telephony Service Remote Code Execution Exploited: No Publicly disclosed: No Exploitability: Exploitation Less Likely
CWE
Patch Diff
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Description
Stack-based buffer overflow in Windows Telephony Service allows an unauthorized attacker to execute code over a network.
FAQ / Articles
FAQ
According to the CVSS metric, the attack vector is network (AV:N) and the user interaction is required (UI:R). What is the target context of the remote code execution? This attack requires a client to connect to a malicious server, and that could allow the attacker to gain code execution on the client.
FAQ
Are the updates for Windows 10 for x64-based Systems and Windows 10 for 32-bit Systems currently available? Yes. As of April 9, 2025, the security update (5055547) for Windows 10 for x64-based Systems and Windows 10 for 32-bit Systems are available. Customers running Windows 10 should ensure the update is installed to be protected from this vulnerability.
Windows Telephony Service Remote Code Execution Vulnerability
Stack-based buffer overflow in Windows Telephony Service allows an authorized attacker to execute code over a network.
Windows Telephony Service Remote Code Execution Vulnerability
Stack-based buffer overflow in Windows Telephony Service allows an unauthorized attacker to execute code over a network.
FAQ
How could an attacker exploit this vulnerability? An attacker could exploit this vulnerability by tricking a user into sending a request to a malicious server. This could result in the server returning malicious data that might cause arbitrary code execution on the user's system.