CVE-2024-42057

High

Description

A command injection vulnerability in the IPSec VPN feature of 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 V4.16 through V5.38, and USG20(W)-VPN series firmware versions from V4.16 through V5.38 could allow an unauthenticated attacker to execute some OS commands on an affected device by sending a crafted username to the vulnerable device. Note that this attack could be successful only if the device was configured in User-Based-PSK authentication mode and a valid user with a long username exceeding 28 characters exists.

SeverityHigh

CVSS8.1

Exploit probability—

Product

Zyxel Zld

PublishedSep 3, 2024

First seenSep 3, 2024

Weakness typeCWE-78OS command injection

How to fix

Update

zyxel zld5.39 or later

Vendor advisories

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

Affected products

Product	Affected versions	Fixed in
zyxel zld	4.32 ≤ v < 5.39, 4.50 ≤ v < 5.39, 4.16 ≤ v < 5.39	5.39

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