RCE in Zyxel Ax7501-B1 Firmware

CVE-2026-6952

A post-authentication command injection vulnerability in the "LogServer" field of the syslog component in Zyxel AX7501-B1 firmware versions through 5.17(ABPC.7.2)C0 could allow an authenticated attacker with administrator privileges to execute OS commands on an affected device.

Vulnerability class: Command Injection (OS Command Injection)

Published 2026-07-21 · last modified 2026-10-24.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS 0.015, 74.8th percentile (scored 2026-11-11); unchanged over 30 days. About EPSS.

Affected products

Zyxel Ax7501-B1 Firmware — versions <= 5.17(ABPC.7.2)C0

Weakness classification (CWE)

CWE-78 — OS Command Injection

Public exploits and proof-of-concept code

1 public repository with exploit or proof-of-concept code for this CVE:

stevejiang0509/zyxel-cve-2026-6952-model-scope (1 star, last pushed 2026-11-08): Vendor advisory scope, model-by-model evidence, and bounded offline reproduction for CVE-2026-6952

References

www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for… (vendor-advisory)

This CVE has public exploit evidence. See the latest CVEs with public exploits.