CVE-2025-8693: Zyxel AX7501-b0 Firmware

High severity, CVSS 8.8. EPSS: 1.1% chance of exploitation in the next 30 days.

A post-authentication command injection vulnerability in the "priv" parameter of Zyxel DX3300-T0 firmware version 5.50(ABVY.6.3)C0 and earlier could allow an authenticated attacker to execute operating system (OS) commands on an affected device.

Affected products

  • Zyxel AX7501-b0 Firmware: up to and including 5.17\(abpc.6.1\)c0
  • Zyxel AX7501-b1 Firmware: up to and including 5.17\(abpc.6.1\)c0
  • Zyxel DM4200-b0 Firmware: up to and including 5.17\(acbs.1.3\)c0
  • Zyxel DX3300-t0 Firmware: up to and including 5.50\(abvy.6.3\)c0
  • Zyxel DX3300-t1 Firmware: up to and including 5.50\(abvy.6.3\)c0
  • Zyxel DX3301-t0 Firmware: up to and including 5.50\(abvy.6.3\)c0
  • Zyxel DX4510-b1 Firmware: up to and including 5.17\(abyl.9\)c0
  • Zyxel DX5401-b0 Firmware: up to and including 5.17\(abyo.7\)b2
  • Zyxel DX5401-b1 Firmware: up to and including 5.17\(abyo.7\)b2
  • Zyxel EE3301-00 Firmware: up to and including 5.63\(acmu.1.1\)c0
  • Zyxel EE5301-00 Firmware: up to and including 5.63\(acld.1.1\)c0
  • Zyxel EE6510-10 Firmware: up to and including 5.19\(acjq.3\)c0
  • Zyxel EMG3525-t50b Firmware: up to and including 5.50\(abpm.9.5\)c0
  • Zyxel EMG5523-t50b Firmware: up to and including 5.50\(abpm.9.5\)c0
  • Zyxel EMG5723-t50k Firmware: up to and including 5.50\(abom.8.6\)c0
  • Zyxel EX3300-t0 Firmware: up to and including 5.50\(abvy.6.3\)c0; up to and including 5.50\(acdi.2.1\)c0
  • Zyxel EX3300-t1 Firmware: up to and including 5.50\(abvy.6.3\)c0
  • Zyxel EX3301-t0 Firmware: up to and including 5.50\(abvy.6.3\)c0
  • Zyxel EX3500-t0 Firmware: up to and including 5.44\(achr.4\)c0
  • Zyxel EX3501-t0 Firmware: up to and including 5.44\(achr.4\)c0
  • Zyxel EX3510-b0 Firmware: up to and including 5.17\(abup.15\)c0
  • Zyxel EX3510-b1 Firmware: up to and including 5.17\(abup.15\)c0
  • Zyxel EX3600-t0 Firmware: up to and including 5.70\(acif.1.2\)c0
  • Zyxel EX5401-b0 Firmware: up to and including 5.17\(abyo.7\)b2
  • Zyxel EX5401-b1 Firmware: up to and including 5.17\(abyo.7\)b2
  • and 29 more

Published 2025-11-18. Last modified 2026-06-17.