Vulnerability · Published Jan 30, 2024 · Assigned by Zyxel

CVE-2023-5372

High 7.2

In plain English

A high-severity OS command injection in NAS326 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 28.5% (higher than 98% of all known vulnerabilities).

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)28.5%top 1.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The post-authentication command injection vulnerability in Zyxel NAS326 firmware versions through V5.21(AAZF.15)C0 and NAS542 firmware versions through V5.21(ABAG.12)C0 could allow an authenticated attacker with administrator privileges to execute some operating system (OS) commands by sending a crafted query parameter attached to the URL of an affected device’s web management interface.

Affected products (as reported)

Vendor	Product	Versions
Zyxel	NAS326 firmware	<= V5.21(AAZF.15)C0
Zyxel	NAS542 firmware	<= V5.21(ABAG.12)C0

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

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-post-authentication-command-injection-vulnerability-in-nas-products-01-30-2024 vendor-advisory