CVE-2024-5412

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-09-03 · updated 2026-06-17
Weakness: CWE-120

Description

A buffer overflow vulnerability in the library "libclinkc" of the Zyxel VMG8825-T50K firmware version 5.50(ABOM.8)C0 could allow an unauthenticated attacker to cause denial of service (DoS) conditions by sending a crafted HTTP request to a vulnerable device.

Affected products

Zyxel AX7501-B0 firmware: before 5.17\(abpc.5.2\)c0 — fixed in 5.17\(abpc.5.2\)c0
Zyxel AX7501-B1 firmware: before 5.17\(abpc.5.2\)c0 — fixed in 5.17\(abpc.5.2\)c0
Zyxel DX3300-T0 firmware: before 5.50\(abvy.5.3\)c0 — fixed in 5.50\(abvy.5.3\)c0
Zyxel DX3300-T1 firmware: before 5.50\(abvy.5.3\)c0 — fixed in 5.50\(abvy.5.3\)c0
Zyxel DX3301-T0 firmware: before 5.50\(abvy.5.3\)c0 — fixed in 5.50\(abvy.5.3\)c0
Zyxel Dx4510-B0 Firmware: before 5.17\(abyl.7\)b2 — fixed in 5.17\(abyl.7\)b2
Zyxel DX5401-B0 firmware: before 5.17\(abyo.6.2\)c0 — fixed in 5.17\(abyo.6.2\)c0
Zyxel Dx5401-B1 Firmware: before 5.17\(abyo.6.2\)c0 — fixed in 5.17\(abyo.6.2\)c0
Zyxel Emg3525-T50B Firmware: before 5.50\(abpm.9.2\)c0 — fixed in 5.50\(abpm.9.2\)c0
Zyxel Emg5523-T50B Firmware: before 5.50\(abpm.9.2\)c0 — fixed in 5.50\(abpm.9.2\)c0
Zyxel Emg5723-T50K Firmware: before 5.50\(abom.8.4\)c0 — fixed in 5.50\(abom.8.4\)c0
Zyxel Ex3300-T0 Firmware: before 5.50\(abvy.5.3\)c0 — fixed in 5.50\(abvy.5.3\)c0
Zyxel Ex3300-T1 Firmware: before 5.50\(abvy.5.3\)c0 — fixed in 5.50\(abvy.5.3\)c0
Zyxel EX3301-T0 firmware: before 5.50\(abvy.5.3\)c0 — fixed in 5.50\(abvy.5.3\)c0
Zyxel Ex3500-T0 Firmware: before 5.44\(achr.2\)c0 — fixed in 5.44\(achr.2\)c0
Zyxel EX3501-T0 firmware: before 5.44\(achr.2\)c0 — fixed in 5.44\(achr.2\)c0
Zyxel EX3510-B0 firmware: before 5.17\(abup.12\)b2 — fixed in 5.17\(abup.12\)b2
Zyxel Ex5401-B0 Firmware: before 5.17\(abyo.6.2\)c0 — fixed in 5.17\(abyo.6.2\)c0
Zyxel Ex5401-B1 Firmware: before 5.17\(abyo.6.2\)c0 — fixed in 5.17\(abyo.6.2\)c0
Zyxel Ex5510-B0 Firmware: before 5.17\(abqx.10\)b2 — fixed in 5.17\(abqx.10\)b2
Zyxel Ex5512-T0 Firmware: before 5.70\(aceg.3\)c2 — fixed in 5.70\(aceg.3\)c2
Zyxel Ex5601-T0 Firmware: before 5.70\(acdz.3.2\)c0 — fixed in 5.70\(acdz.3.2\)c0
Zyxel EX5601-T1 firmware: before 5.70\(acdz.3.2\)c0 — fixed in 5.70\(acdz.3.2\)c0
Zyxel Ex7501-B0 Firmware: before 5.18\(achn.1.2\)c0 — fixed in 5.18\(achn.1.2\)c0
Zyxel Ex7710-B0 Firmware: before 5.18\(acak.1\)c1 — fixed in 5.18\(acak.1\)c1
Zyxel Nebula Fwa505 Firmware: before 1.18\(acko.4\)c0 — fixed in 1.18\(acko.4\)c0
Zyxel Nebula Fwa510 Firmware: before 1.18\(acgd.4\)c0 — fixed in 1.18\(acgd.4\)c0
Zyxel Nebula Fwa710 Firmware: before 1.18\(acgc.4\)c0 — fixed in 1.18\(acgc.4\)c0
Zyxel Nebula Lte3301-Plus Firmware: before 1.18\(acca.4\)c0 — fixed in 1.18\(acca.4\)c0
Zyxel Nr5103 Firmware: before 4.19\(abyc.6\)c0 — fixed in 4.19\(abyc.6\)c0

How to fix

Upgrade to a fixed version: Zyxel AX7501-B0 firmware 5.17\(abpc.5.2\)c0; Zyxel AX7501-B1 firmware 5.17\(abpc.5.2\)c0; Zyxel DX3300-T0 firmware 5.50\(abvy.5.3\)c0; Zyxel DX3300-T1 firmware 5.50\(abvy.5.3\)c0; Zyxel DX3301-T0 firmware 5.50\(abvy.5.3\)c0; Zyxel Dx4510-B0 Firmware 5.17\(abyl.7\)b2; Zyxel DX5401-B0 firmware 5.17\(abyo.6.2\)c0; Zyxel Dx5401-B1 Firmware 5.17\(abyo.6.2\)c0; Zyxel Emg3525-T50B Firmware 5.50\(abpm.9.2\)c0; Zyxel Emg5523-T50B Firmware 5.50\(abpm.9.2\)c0; Zyxel Emg5723-T50K Firmware 5.50\(abom.8.4\)c0; Zyxel Ex3300-T0 Firmware 5.50\(abvy.5.3\)c0. Check the vendor advisory for mitigations.

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-buffer-overflow-vulnerability-in-some-5g-nr-cpe-dsl-ethernet-cpe-fiber-ont-wifi-extender-and-security-router-devices-09-03-2024

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