PT-2025-15484 · Microsoft · Windows Telephony Service+1

Floriel · Published 2025-04-08 · Updated 2025-04-09 · CVE-2025-21221

Positive Technologies (AI Summary)

CVSS v2.0

10

High

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

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

Description: The issue is a heap-based buffer overflow that allows unauthorized attackers to execute code over a network. It enables remote attackers to execute arbitrary code and affect the system.

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

BDU:2025-04118

CVE-2025-21221

Affected Products

Windows

Windows Telephony Service

References · 8

• https://bdu.fstec.ru/vul/2025-04118 · Security Note
• https://osv.dev/vulnerability/CVE-2025-21221 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-21221 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21221 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-21221 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-21221 · Vendor Advisory
• https://twitter.com/CVEnew/status/1909906958993273213 · Twitter Post
• https://twitter.com/cybercronai/status/1910105970589524129 · Twitter Post