CVE-2024-8748: Zyxel AX7501-b0 Firmware

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

A buffer overflow vulnerability in the packet parser of the third-party library "libclinkc" in Zyxel VMG8825-T50K firmware versions through V5.50(ABOM.8.4)C0 could allow an attacker to cause a temporary denial of service (DoS) condition against the web management interface by sending a crafted HTTP POST request to a vulnerable device.

Affected products

• Zyxel AX7501-b0 Firmware: before 5.17\(abpc.5.3\)c0 (fixed in 5.17\(abpc.5.3\)c0)
• Zyxel AX7501-b1 Firmware: before 5.17\(abpc.5.3\)c0 (fixed in 5.17\(abpc.5.3\)c0)
• Zyxel DX3300-t0 Firmware: before 5.50\(aby.5.4\)c0 (fixed in 5.50\(aby.5.4\)c0)
• Zyxel DX3300-t1 Firmware: before 5.50\(aby.5.4\)c0 (fixed in 5.50\(aby.5.4\)c0)
• Zyxel DX3301-t0 Firmware: before 5.50\(aby.5.4\)c0 (fixed in 5.50\(aby.5.4\)c0)
• Zyxel DX4510-b0 Firmware: before 5.17\(abyl.8\)c0 (fixed in 5.17\(abyl.8\)c0)
• Zyxel DX4510-b1 Firmware: before 5.17\(abyl.8\)c0 (fixed in 5.17\(abyl.8\)c0)
• Zyxel DX5401-b0 Firmware: before 5.17\(abyo.6.4\)c0 (fixed in 5.17\(abyo.6.4\)c0)
• Zyxel DX5401-b1 Firmware: before 5.17\(abyo.6.4\)c0 (fixed in 5.17\(abyo.6.4\)c0)
• Zyxel EE6510-10 Firmware: before 5.19\(acjq.1\)c0 (fixed in 5.19\(acjq.1\)c0)
• Zyxel EMG3525-t50b Firmware: before 5.50\(abpm.9.3\)c0 (fixed in 5.50\(abpm.9.3\)c0)
• Zyxel EMG5523-t50b Firmware: before 5.50\(abpm.9.3\)c0 (fixed in 5.50\(abpm.9.3\)c0)
• Zyxel EMG5723-t50k Firmware: before 5.50\(abom.8.5\)c0 (fixed in 5.50\(abom.8.5\)c0)
• Zyxel EMG6726-b10a Firmware: before 5.13\(abnp.8\)c1 (fixed in 5.13\(abnp.8\)c1)
• Zyxel EX2210-t0 Firmware: before 5.50\(acdi.2\)c0 (fixed in 5.50\(acdi.2\)c0)
• Zyxel EX3300-t0 Firmware: before 5.50\(aby.5.4\)c0 (fixed in 5.50\(aby.5.4\)c0)
• Zyxel EX3300-t1 Firmware: before 5.50\(aby.5.4\)c0 (fixed in 5.50\(aby.5.4\)c0)
• Zyxel EX3301-t0 Firmware: before 5.50\(aby.5.4\)c0 (fixed in 5.50\(aby.5.4\)c0)
• Zyxel EX3500-t0 Firmware: before 5.44\(achr.3\)c0 (fixed in 5.44\(achr.3\)c0)
• Zyxel EX3501-t0 Firmware: before 5.44\(achr.3\)c0 (fixed in 5.44\(achr.3\)c0)
• Zyxel EX3510-b0 Firmware: before 5.17\(abup.13\)c0 (fixed in 5.17\(abup.13\)c0)
• Zyxel EX3510-b1 Firmware: before 5.17\(abup.13\)c0 (fixed in 5.17\(abup.13\)c0)
• Zyxel EX3600-t0 Firmware: before 5.70\(acif.0.4\)c0 (fixed in 5.70\(acif.0.4\)c0)
• Zyxel EX5401-b0 Firmware: before 5.17\(abyo.6.4\)c0 (fixed in 5.17\(abyo.6.4\)c0)
• Zyxel EX5401-b1 Firmware: before 5.17\(abyo.6.4\)c0 (fixed in 5.17\(abyo.6.4\)c0)
• and 38 more

Published 2024-12-03. Last modified 2026-06-17.