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

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Zkteco/Zkbiosecurity V5000llm-fuzzy
Range: 3.0

Patches

Vulnerability mechanics

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

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