CVE-2026-0711: Zyxel AX7501-b0 Firmware

Medium severity, CVSS 6.8. EPSS: 0.8% chance of exploitation in the next 30 days.

A post-authentication command injection vulnerability in the EasyMesh-related APIs of Zyxel DX3300-T0 firmware versions through 5.50(ABVY.7.1)C0 could allow an authenticated, adjacent attacker with administrator privileges to execute OS commands on an affected device.

Affected products

• Zyxel AX7501-b0 Firmware: before 5.17\(abpc.7.2\)c0 (fixed in 5.17\(abpc.7.2\)c0)
• Zyxel AX7501-b1 Firmware: before 5.17\(abpc.7.2\)c0 (fixed in 5.17\(abpc.7.2\)c0)
• Zyxel DX3300-t0 Firmware: before 5.50\(abvy.7.2\)c0 (fixed in 5.50\(abvy.7.2\)c0)
• Zyxel DX3300-t1 Firmware: before 5.50\(abvy.7.2\)c0 (fixed in 5.50\(abvy.7.2\)c0)
• Zyxel DX3301-t0 Firmware: before 5.50\(abvy.7.2\)c0 (fixed in 5.50\(abvy.7.2\)c0)
• Zyxel DX5401-b0 Firmware: before 5.17\(abyo.7.2\)c0 (fixed in 5.17\(abyo.7.2\)c0)
• Zyxel DX5401-b1 Firmware: before 5.17\(abyo.7.2\)c0 (fixed in 5.17\(abyo.7.2\)c0)
• Zyxel EE3301-00 Firmware: before 5.63\(acmu.3.1\)c0 (fixed in 5.63\(acmu.3.1\)c0)
• Zyxel EE5301-00 Firmware: before 5.63\(acld.3.1\)c0 (fixed in 5.63\(acld.3.1\)c0)
• Zyxel EE6510-10 Firmware: before 5.19\(acjq.4.2\)c0 (fixed in 5.19\(acjq.4.2\)c0)
• Zyxel EMG3525-t50b Firmware: before 5.50\(abpm.9.8\)c0 (fixed in 5.50\(abpm.9.8\)c0)
• Zyxel EMG5523-t50b Firmware: before 5.50\(abpm.9.8\)c0 (fixed in 5.50\(abpm.9.8\)c0)
• Zyxel EX3300-t0 Firmware: before 5.50\(abvy.7.2\)c0 (fixed in 5.50\(abvy.7.2\)c0)
• Zyxel EX3300-t1 Firmware: before 5.50\(abvy.7.2\)c0 (fixed in 5.50\(abvy.7.2\)c0)
• Zyxel EX3301-t0 Firmware: before 5.50\(abvy.7.2\)c0 (fixed in 5.50\(abvy.7.2\)c0)
• Zyxel EX3500-t0 Firmware: before 5.44\(achr.6\)c0 (fixed in 5.44\(achr.6\)c0)
• Zyxel EX3501-t0 Firmware: before 5.44\(achr.6\)c0 (fixed in 5.44\(achr.6\)c0)
• Zyxel EX3600-t0 Firmware: before 5.70\(acif.3\)c0 (fixed in 5.70\(acif.3\)c0)
• Zyxel EX5401-b0 Firmware: before 5.17\(abyo.7.2\)c0 (fixed in 5.17\(abyo.7.2\)c0)
• Zyxel EX5401-b1 Firmware: before 5.17\(abyo.7.2\)c0 (fixed in 5.17\(abyo.7.2\)c0)
• Zyxel EX5512-t0 Firmware: before 5.70\(aceg.5.5\)c0 (fixed in 5.70\(aceg.5.5\)c0)
• Zyxel EX5601-t0 Firmware: before 5.70\(acdz.6\)c0 (fixed in 5.70\(acdz.6\)c0)
• Zyxel EX5601-t1 Firmware: before 5.70\(acdz.6\)c0 (fixed in 5.70\(acdz.6\)c0)
• Zyxel EX7501-b0 Firmware: before 5.18\(achn.3.2\)c0 (fixed in 5.18\(achn.3.2\)c0)
• Zyxel Nebula FWA515 Firmware: before 1.60\(acpz.0\)v0 (fixed in 1.60\(acpz.0\)v0)
• and 11 more

Published 2026-04-28. Last modified 2026-07-25.