CVE-2025-13943: Zyxel AM7510-00 Firmware

High severity, CVSS 8.8. EPSS: 1.4% chance of exploitation in the next 30 days.

A post-authentication command injection vulnerability in the log file download function of the Zyxel EX3301-T0 firmware versions through 5.50(ABVY.7)C0 could allow an authenticated attacker to execute operating system (OS) commands on an affected device.

Affected products

• Zyxel AM7510-00 Firmware: before 5.63\(acoe.0.1\)c0 (fixed in 5.63\(acoe.0.1\)c0)
• Zyxel AX7501-b1 Firmware: before 5.17\(abpc.7.1\)c0 (fixed in 5.17\(abpc.7.1\)c0)
• Zyxel DM4200-b0 Firmware: before 5.17\(acbs.1.6\)c0 (fixed in 5.17\(acbs.1.6\)c0)
• Zyxel DX3300-t0 Firmware: before 5.50\(abvy.7.1\)c0 (fixed in 5.50\(abvy.7.1\)c0)
• Zyxel DX3300-t1 Firmware: before 5.50\(abvy.7.1\)c0 (fixed in 5.50\(abvy.7.1\)c0)
• Zyxel DX3301-t0 Firmware: before 5.50\(abvy.7.1\)c0 (fixed in 5.50\(abvy.7.1\)c0)
• Zyxel DX4510-b0 Firmware: before 5.17\(abyl.10.1\)c0 (fixed in 5.17\(abyl.10.1\)c0)
• Zyxel DX4510-b1 Firmware: before 5.17\(abyl.10.1\)c0 (fixed in 5.17\(abyl.10.1\)c0)
• Zyxel DX5401-b1 Firmware: before 5.17\(abyo.7.1\)c0 (fixed in 5.17\(abyo.7.1\)c0)
• Zyxel EE3301-00 Firmware: before 5.63\(acmu.2.1\)c0 (fixed in 5.63\(acmu.2.1\)c0)
• Zyxel EE5301-00 Firmware: before 5.63\(acld.2.1\)c0 (fixed in 5.63\(acld.2.1\)c0)
• Zyxel EE6510-10 Firmware: before 5.19\(acjq.4.1\)c0 (fixed in 5.19\(acjq.4.1\)c0)
• Zyxel EMG3525-t50b Firmware: before 5.50\(abpm.9.7\)c0 (fixed in 5.50\(abpm.9.7\)c0)
• Zyxel EMG5523-t50b Firmware: before 5.50\(abpm.9.7\)c0 (fixed in 5.50\(abpm.9.7\)c0)
• Zyxel EMG6726-b10a Firmware: before 5.13\(abnp.8.2\)c1 (fixed in 5.13\(abnp.8.2\)c1)
• Zyxel EX2210-t0 Firmware: before 5.50\(acdi.2.3\)c0 (fixed in 5.50\(acdi.2.3\)c0)
• Zyxel EX3300-t0 Firmware: before 5.50\(abvy.7.1\)c0 (fixed in 5.50\(abvy.7.1\)c0)
• Zyxel EX3300-t1 Firmware: before 5.50\(abvy.7.1\)c0 (fixed in 5.50\(abvy.7.1\)c0)
• Zyxel EX3301-t0 Firmware: before 5.50\(abvy.7.1\)c0 (fixed in 5.50\(abvy.7.1\)c0)
• Zyxel EX3500-t0 Firmware: before 5.44\(achr.5.1\)c0 (fixed in 5.44\(achr.5.1\)c0)
• Zyxel EX3501-t0 Firmware: before 5.44\(achr.5.1\)c0 (fixed in 5.44\(achr.5.1\)c0)
• Zyxel EX3510-b0 Firmware: before 5.17\(abup.15.2\)c0 (fixed in 5.17\(abup.15.2\)c0)
• Zyxel EX3510-b1 Firmware: before 5.17\(abup.15.2\)c0 (fixed in 5.17\(abup.15.2\)c0)
• Zyxel EX3600-t0 Firmware: before 5.70\(acif.2.1\)c0 (fixed in 5.70\(acif.2.1\)c0)
• Zyxel EX5401-b1 Firmware: before 5.17\(abyo.7.1\)c0 (fixed in 5.17\(abyo.7.1\)c0)
• and 27 more

Published 2026-02-24. Last modified 2026-06-17.