CVE-2024-42058

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% 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-476

Description

A null pointer dereference vulnerability in Zyxel ATP series firmware versions from V4.32 through V5.38, USG FLEX series firmware versions from V4.50 through V5.38, USG FLEX 50(W) series firmware versions from V5.20 through V5.38, and USG20(W)-VPN series firmware versions from V5.20 through V5.38 could allow an unauthenticated attacker to cause DoS conditions by sending crafted packets to a vulnerable device.

Affected products

Zyxel firewall (ZLD): from 4.32 before 5.39; from 4.50 before 5.39; from 4.20 before 5.39 — fixed in 5.39

How to fix

Upgrade to a fixed version: Zyxel firewall (ZLD) 5.39. Check the vendor advisory for mitigations.

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-09-03-2024

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