Critical severity9.8NVD Advisory· Published Mar 16, 2026· Updated Apr 15, 2026

CVE-2016-20030

Description

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.

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

exchange.xforce.ibmcloud.com/vulnerabilities/116485nvd
packetstormsecurity.com/files/138573nvd
www.vulncheck.com/advisories/zkteco-zkbiosecurity-user-enumeration-via-authloginactionnvd
www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5366.phpnvd

News mentions

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cvss	0.637
epss	0.000
exploit	0.000
kev	0.000
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ransomware	0.000