PT-2025-4219 · Microsoft · Windows Telephony Service+1

Published 2025-01-14 · Updated 2025-01-21 · CVE-2025-21339

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Windows Telephony Service (affected versions not specified)

Description The issue allows remote attackers to execute arbitrary code, affecting the system. This can lead to unauthorized access and control. No information is provided about the estimated number of potentially affected devices or real-world incidents where this issue was exploited.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

CVE-2025-21339

Affected Products

Windows

Windows Telephony Service

References · 6

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21339 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-21339 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-21339 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/716857 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-21339 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-21339 · Security Note