CVE-2023-35137

High

Description

An improper authentication vulnerability in the authentication module of the Zyxel NAS326 firmware version V5.21(AAZF.14)C0 and NAS542 firmware version V5.21(ABAG.11)C0 could allow an unauthenticated attacker to obtain system information by sending a crafted URL to a vulnerable device.

SeverityHigh

CVSS7.5

Exploit probability—

Product

Zyxel Nas326 Firmware

PublishedNov 30, 2023

First seenNov 30, 2023

Weakness typeCWE-287Improper authentication

How to fix

Vendor advisories

zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-authentication-bypass-and-command-injection-vulnerabilities-in-nas-products

Affected products

Product	Affected versions	Fixed in
zyxel nas326_firmware	v ≤ 5.21\(aazf.14\)c0	—
zyxel nas542_firmware	v ≤ 5.21\(abag.11\)c0	—

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