Vulnerability · Published Jul 17, 2023 · Assigned by Zyxel

CVE-2023-34138

High 8.0

In plain English

A high-severity OS command injection in ATP series firmware from Zyxel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).

Severity (CVSS 3.1)8.0High

Exploit odds (30 days)0.7%top 47.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A command injection vulnerability in the hotspot management feature of the Zyxel ATP series firmware versions 4.60 through 5.36 Patch 2, USG FLEX series firmware versions 4.60 through 5.36 Patch 2, USG FLEX 50(W) series firmware versions 4.60 through 5.36 Patch 2, USG20(W)-VPN series firmware versions 4.60 through 5.36 Patch 2, and VPN series firmware versions 4.60 through 5.36 Patch 2, could allow an unauthenticated, LAN-based attacker to execute some OS commands on an affected device if the attacker could trick an authorized administrator to add their IP address to the list of trusted RADIUS clients in advance.

Affected products (as reported)

Vendor	Product	Versions
Zyxel	ATP series firmware	4.60 through 5.36 Patch 2
Zyxel	USG FLEX series firmware	4.60 through 5.36 Patch 2
Zyxel	USG FLEX 50(W) series firmware	4.60 through 5.36 Patch 2
Zyxel	USG20(W)-VPN series firmware	4.60 through 5.36 Patch 2
Zyxel	VPN series firmware	4.60 through 5.36 Patch 2

Weakness: CWE-78 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-wlan-controllers vendor-advisory