CVE-2025-7673 CRITICAL

CVE-2025-7673

Vendor Zyxel
Product VMG8825-T50K firmware
Weakness CWE-120
Published July 16, 2025
Last update February 26, 2026

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

A buffer overflow vulnerability in the URL parser of the zhttpd web server in Zyxel VMG8825-T50K firmware versions prior to V5.50(ABOM.5)C0 could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and potentially execute arbitrary code by sending a specially crafted HTTP request.

Key dates

02Disclosure timeline

July 16, 2025 CVE published
February 26, 2026 Record updated