IBM X-Force Exchangevdb entry
https://exchange.xforce.ibmcloud.com/vulnerabilities/116485 CVE-2016-20030
CRITICAL
ZKTeco ZKBioSecurity 3.0 User Enumeration via authLoginAction
Record summary
CVE-2016-20030 has a selected CVSS score of 9.3 (critical).
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.
Description source: CVE List
Exploitation context
CISA SSVC decision
ExploitationPoC
AutomatableYes
Technical impactPartial
CISA Coordinator · SSVC 2.0.3 · Evaluated Mar 16, 2026 · Source: CVE List
Affected products and versions
1| Product | Source | Version range | Status |
|---|---|---|---|
ZKTeco ZKBioSecurityBrowse ZKTeco Inc. / ZKTeco ZKBioSecurity | CVE List | 3.0.1.0_R_230 | affected |
References
5nvd.nist.gov
https://nvd.nist.gov/vuln/detail/CVE-2016-20030 Packet Storm Securityexploit
https://packetstormsecurity.com/files/138573 VulnCheck Advisory: ZKTeco ZKBioSecurity 3.0 User Enumeration via authLoginActionThird-party advisory
https://www.vulncheck.com/advisories/zkteco-zkbiosecurity-user-enumeration-via-authloginaction Zero Science Lab DisclosureThird-party advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5366.php