CVE-2022-26414: Zyxel AX7501-b0 Firmware

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

A potential buffer overflow vulnerability was identified in some internal functions of Zyxel VMG3312-T20A firmware version 5.30(ABFX.5)C0, which could be exploited by a local authenticated attacker to cause a denial of service.

Affected products

• Zyxel AX7501-b0 Firmware: before 5.17\(abpc.1\)c0 (fixed in 5.17\(abpc.1\)c0)
• Zyxel DX5401-b0 Firmware: before 5.17\(abyo.1\)c0 (fixed in 5.17\(abyo.1\)c0)
• Zyxel EMG3525-t50b Firmware: before 5.50\(abpm.6\)c0 (fixed in 5.50\(abpm.6\)c0)
• Zyxel EMG5523-t50b Firmware: before 5.50\(abpm.6\)c0 (fixed in 5.50\(abpm.6\)c0)
• Zyxel EMG5723-t50k Firmware: before 5.50\(abom.7\)c0 (fixed in 5.50\(abom.7\)c0)
• Zyxel EMG6726-b10a Firmware: before 5.13\(abnp.7\)c0 (fixed in 5.13\(abnp.7\)c0)
• Zyxel EP240P Firmware: before 5.40\(abh.0\)c0 (fixed in 5.40\(abh.0\)c0)
• Zyxel EX3510-b0 Firmware: before 5.17\(abup.4\)c1 (fixed in 5.17\(abup.4\)c1)
• Zyxel EX5401-b0 Firmware: before 5.17\(abyo.1\)c0 (fixed in 5.17\(abyo.1\)c0)
• Zyxel EX5501-b0 Firmware: before 5.17\(abry.2\)c0 (fixed in 5.17\(abry.2\)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)
• Zyxel PMG5617GA Firmware: before 5.40\(abna.2\)c0 (fixed in 5.40\(abna.2\)c0)
• Zyxel PMG5622GA Firmware: before 5.40\(abnb.2\)c0 (fixed in 5.40\(abnb.2\)c0)
• Zyxel PX7501-b0 Firmware: before 5.17\(abpc.1\)c0 (fixed in 5.17\(abpc.1\)c0)
• Zyxel VMG1312-t20b Firmware: before 5.50\(absb.5\)c0 (fixed in 5.50\(absb.5\)c0)
• Zyxel VMG3312-t20a Firmware: version 5.30(abfx.5)c0 only
• Zyxel VMG3625-t50b Firmware: before 5.50\(abpm.6\)c0 (fixed in 5.50\(abpm.6\)c0)
• Zyxel VMG3927-b50a Firmware: before 5.17\(abmt.6\)c0 (fixed in 5.17\(abmt.6\)c0)
• Zyxel VMG3927-b50b Firmware: before 5.13\(ably.7\)c0 (fixed in 5.13\(ably.7\)c0)
• Zyxel VMG3927-b60a Firmware: before 5.17\(abmt.6\)c0 (fixed in 5.17\(abmt.6\)c0)
• Zyxel VMG3927-t50k Firmware: before 5.50\(abom.7\)c0 (fixed in 5.50\(abom.7\)c0)
• Zyxel VMG4927-b50a Firmware: before 5.13\(ably.7\)c0 (fixed in 5.13\(ably.7\)c0)
• Zyxel VMG8623-t50b Firmware: before 5.50\(abpm.6\)c0 (fixed in 5.50\(abpm.6\)c0)
• and 7 more

Published 2022-04-11. Last modified 2026-06-17.