CVE-2025-54465

Medium

Description

This vulnerability exists in ZKTeco WL20 due to hard-coded MQTT credentials and endpoints stored in plaintext within the device firmware. An attacker with physical access could exploit this vulnerability by extracting the firmware and analyzing the binary data to retrieve the hard-coded MQTT credentials and endpoints from the targeted device. Successful exploitation of this vulnerability could allow the attacker to gain unauthorized access to the MQTT broker and manipulate the communications of the targeted device.

SeverityMedium

CVSS6.8

Exploit probability—

ProductWL20 Biometric Attendance System

PublishedAug 13, 2025

First seenAug 13, 2025

Weakness typeCWE-798Hard-coded credentials

How to fix

Vendor advisories

zkteco.com/en/Security_Bulletinsibs/20

Affected products

Product	Affected versions	Fixed in
ZKTeco Co WL20 Biometric Attendance System	<=ZLM31-FXO1-3.1.8	—

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