Remote Code Execution Vulnerability in Windows Telephony Service by Microsoft
CVE-2025-21339

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 1809
Windows Server 2019
Windows Server 2019 (server Core Installation)
Windows Server 2022
Vendor
CVE Published:
14 January 2025

What is CVE-2025-21339?

The vulnerability in the Windows Telephony Service allows remote attackers to execute arbitrary code on affected systems. By sending specially crafted requests, an attacker can exploit this flaw to gain unauthorized access and control over system resources, potentially leading to further exploitation or data compromise.

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Affected Version(s)

Windows 10 Version 1507 32-bit Systems 10.0.10240.0 < 10.0.10240.20890

Windows 10 Version 1607 32-bit Systems 10.0.14393.0 < 10.0.14393.7699

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.6775

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisory

EPSS Score

6% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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