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CVE-2016-20030 - Vulnerability Analysis

CriticalCVSS: 9.8

Last Updated: March 16, 2026

Published: March 16, 2026Updated: March 16, 2026Remote Exploitable

Overview

ZKTeco ZKBioSecurity 3.0 contains a user enumeration vulnerability that allows unauthenticated attackers to discover valid usernames by submitting partial characters via the username parameter. Attackers can send requests to the authLoginAction!login.do script with varying username inputs to enumerate valid user accounts based on application responses.

Severity & Score

Severity: Critical

CVSS Score: 9.8

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/116485
https://packetstormsecurity.com/files/138573
https://www.vulncheck.com/advisories/zkteco-zkbiosecurity-user-enumeration-via-authloginaction
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5366.php

Related Resources

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Details

CVE ID: CVE-2016-20030
Severity: Critical
CVSS Score: 9.8
Status: unconfirmed

CWE

CWE-551

CVSS Metrics

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H