Vulnerability · Published Aug 13, 2025 · Assigned by CERT-In

CVE-2025-55280Information Disclosure Vulnerability in ZKTeco WL20

Medium 5.2

In plain English

A medium-severity security flaw in WL20 Biometric Attendance System from ZKTeco Co. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities).

Severity (CVSS 4.0)5.2Medium

Exploit odds (30 days)0.1%top 96.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

This vulnerability exists in ZKTeco WL20 due to storage of Wi-Fi credentials, configuration data and system data in plaintext within the device firmware. An attacker with physical access could exploit this vulnerability by extracting the firmware and reverse engineer the binary data to access the plaintext sensitive data stored in the targeted device. Successful exploitation of this vulnerability could allow the attacker to gain unauthorized network access, retrieve and manipulate data on the targeted device.

Affected products (as reported)

Vendor	Product	Versions
ZKTeco Co	WL20 Biometric Attendance System	<=ZLM31-FXO1-3.1.8

Weakness: CWE-312 · Vector: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N

References

https://www.cert-in.org.in/s2cMainServlet?pageid=PUBVLNOTES01&VLCODE=CIVN-2025-0172 third-party-advisory