PT-2026-25728 · Undefined · Undefined

Published 2026-03-15 · Updated 2026-06-08 · CVE-2016-20030

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions ZKTeco ZKBioSecurity version 3.0

Description The software contains a flaw that allows unauthenticated attackers to discover valid usernames. This is possible by submitting partial characters through the username parameter. Attackers can send requests to the /authLoginAction!login.do endpoint with different username inputs and enumerate valid user accounts based on the application's responses.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Weakness Enumeration

CWE-551

Related Identifiers

CVE-2016-20030

Affected Products

Undefined

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2016-20030 · Security Note
• https://vulncheck.com/advisories/zkteco-zkbiosecurity-user-enumeration-via-authloginaction · Note
• https://exchange.xforce.ibmcloud.com/vulnerabilities/116485 · Note
• https://t.me/cveNotify/166539 · Telegram Post
• https://t.me/CVEtracker/47431 · Telegram Post
• https://packetstormsecurity.com/files/138573 · Note
• https://zeroscience.mk/en/vulnerabilities/ZSL-2016-5366.php · Note