CVE-2025-7673

CRITICAL EXPLOITED

Zyxel VMG8825-T50K <V5.50(ABOM.5)C0 - Buffer Overflow

Title source: llm

Description

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.

References (1)

[Vendor Advisory] https://www.zyxel.com/service-provider/global/en/zyxel-security-advisory-remote-code-execution-and-denial-service-vulnerabilities-cpe

Scores

CVSS v3 9.8

EPSS 0.0040

EPSS Percentile 60.1%

Attack Vector NETWORK

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

Exploitation Intel

VulnCheck KEV 2025-07-16

Classification

CWE

CWE-120

Status published

Affected Products (26)

zyxel/emg3525-t50b_firmware < 5.50\(abpm.4\)c0

zyxel/emg3525-t50b_firmware < 5.50\(absl.0\)b8

zyxel/emg5523-t50b_firmware < 5.50\(abpm.4\)c0

zyxel/emg5523-t50b_firmware < 5.50\(absl.0\)b8

zyxel/emg5723-t50k_firmware < 5.50\(abom.5\)c0

zyxel/emg6726-b10a_firmware < 5.13\(abnp.6\).c

zyxel/ex3510-b0_firmware < 5.17\(abup.3\)c0

zyxel/ex5510-b0_firmware < 5.15\(abqx.3\)c0

zyxel/vmg1312-t20b_firmware < 5.50\(absb.3\)c0

zyxel/vmg3625-t50b_firmware < 5.50\(abpm.4\)c0

zyxel/vmg3925-b10b_firmware < 5.13\(aavf.16\)c

zyxel/vmg3925-b10c_firmware < 5.13\(aavf.16\)c

zyxel/vmg3927-b50a_firmware < 5.15\(abmt.5\)c0

zyxel/vmg3927-b60a_firmware < 5.15\(abmt.5\)c0

zyxel/vmg3927-b50b_firmware < 5.13\(ably.6\)c0

... and 11 more

Timeline

Published Jul 16, 2025

Tracked Since Feb 18, 2026