PT-2026-5321 · Vx800V · Vx800V

Published 2026-01-29 · Updated 2026-03-09 · CVE-2025-15542

Positive Technologies (AI Summary)

CVSS v4.0

6.3

Medium

Base vector

AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions VX800v version 1.0

Description A flaw exists in the handling of exceptional conditions during SIP processing. An attacker can send specially crafted INVITE messages to flood the device, leading to a denial of service by blocking all voice lines and disrupting incoming calls. The affected component is SIP processing.

Recommendations Update to a newer version that contains a fix for this vulnerability.

Fix

DoS

Improper Check for Exceptional Conditions

Weakness Enumeration

CWE-754

Related Identifiers

CVE-2025-15542

Affected Products

Vx800V

References · 7

• https://tp-link.com/de/support/download/vx800v/#Firmware · Patch
• https://osv.dev/vulnerability/CVE-2025-15542 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-15542 · Security Note
• https://tp-link.com/us/support/faq/4930 · Vendor Advisory
• https://twitter.com/VulmonFeeds/status/2017034650967830624 · Twitter Post
• https://twitter.com/CVEnew/status/2016948637973049426 · Twitter Post
• https://t.me/cveNotify/154839 · Telegram Post