CVE-2025-15542

Denial of Service (DoS) of VoIP Communication on TP-Link VX800v

State: Published
Severity: 6.3 Medium
Published: Jan 29, 2026
Updated: Jan 29, 2026
Reserved: Jan 20, 2026

Description

Improper handling of exceptional conditions in VX800v v1.0 in SIP processing allows an attacker to flood the device with crafted INVITE messages, blocking all voice lines and causing a denial of service on incoming calls.

Scores

CVSS	Score	Vector	Source
4.0	6.3 Medium	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N	TPLink

Weaknesses

CWE-754 Improper Check for Unusual or Exceptional Conditions

Affected Products

Product	Versions
VX800v v1.0TP-Link Systems Inc.	before 800.0.12 (0.12.0 3.0.0 v603c.0 Build 250912)Affected

References

https://www.tp-link.com/de/support/download/vx800v/#Firmwarepatch
https://www.tp-link.com/us/support/faq/4930/vendor-advisory

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