CVE-2021-35036: Zyxel AX7501-b0 Firmware

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

A cleartext storage of information vulnerability in the Zyxel VMG3625-T50B firmware version V5.50(ABTL.0)b2k could allow an authenticated attacker to obtain sensitive information from the configuration file.

Affected products

• Zyxel AX7501-b0 Firmware: before 5.17\(abpc.2\)c0 (fixed in 5.17\(abpc.2\)c0)
• Zyxel DX3301-t0 Firmware: before 5.50\(abvy.3\)c0 (fixed in 5.50\(abvy.3\)c0)
• Zyxel DX5401-b0 Firmware: before 5.17\(abyo.2\)c0 (fixed in 5.17\(abyo.2\)c0)
• Zyxel EMG3525-t50b Firmware: before 5.50\(abpm.7\)c0 (fixed in 5.50\(abpm.7\)c0)
• Zyxel EMG5523-t50b Firmware: before 5.50\(abpm.7\)c0 (fixed in 5.50\(abpm.7\)c0)
• Zyxel EMG5723-t50k Firmware: before 5.50\(abom.8\)c0 (fixed in 5.50\(abom.8\)c0)
• Zyxel EP240P Firmware: before 5.40\(abvh.0\)c0a03 (fixed in 5.40\(abvh.0\)c0a03)
• Zyxel EX5401-b0 Firmware: before 5.17\(abyo.2\)c0 (fixed in 5.17\(abyo.2\)c0)
• Zyxel EX5501-b0 Firmware: before 5.17\(abry.3\)c0 (fixed in 5.17\(abry.3\)c0)
• Zyxel LTE3301-Plus Firmware: before 1.00\(abqu.6\)c0 (fixed in 1.00\(abqu.6\)c0)
• Zyxel LTE5388-m804 Firmware: before 1.00\(abra.6\)c0 (fixed in 1.00\(abra.6\)c0)
• Zyxel LTE5388-s905 Firmware: before 1.00\(abvi.6\)c0 (fixed in 1.00\(abvi.6\)c0)
• Zyxel LTE5398-m904 Firmware: before 1.00\(abqv.2\)c0 (fixed in 1.00\(abqv.2\)c0)
• Zyxel LTE7240-m403 Firmware: before 2.00\(abmg.6\)c0 (fixed in 2.00\(abmg.6\)c0)
• Zyxel LTE7461-m602 Firmware: before 2.00\(abqn.6\)c0 (fixed in 2.00\(abqn.6\)c0)
• Zyxel LTE7480-m804 Firmware: before 1.00\(abra.6\)c0 (fixed in 1.00\(abra.6\)c0)
• Zyxel LTE7480-s905 Firmware: before 2.00\(abqt.6\)c0 (fixed in 2.00\(abqt.6\)c0)
• Zyxel LTE7485-s905 Firmware: before 1.00\(abvn.6\)c0 (fixed in 1.00\(abvn.6\)c0)
• Zyxel LTE7490-m804 Firmware: before v1.00\(abqy.5\)c0 (fixed in v1.00\(abqy.5\)c0)
• Zyxel NR5101 Firmware: before 1.00\(abvc.6\)c0 (fixed in 1.00\(abvc.6\)c0)
• Zyxel NR7101 Firmware: before 1.00\(abuv.7\)c0 (fixed in 1.00\(abuv.7\)c0)
• Zyxel NR7102 Firmware: before 1.00\(abyd.2\)c0 (fixed in 1.00\(abyd.2\)c0)
• Zyxel PM7300-t0 Firmware: before 5.42\(acbc.1\)c0 (fixed in 5.42\(acbc.1\)c0)
• Zyxel PMG5317-t20b Firmware: before 5.40\(abki.4\)c0 (fixed in 5.40\(abki.4\)c0)
• Zyxel PMG5617-t20b2 Firmware: before 5.41\(acbb.1\)c0 (fixed in 5.41\(acbb.1\)c0)
• and 6 more

Published 2022-03-01. Last modified 2026-06-17.