CVE-2016-20030ZKTeco ZKBioSecurity 3.0 User Enumeration via authLoginAction
Updated under an hour ago ()
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It affects ZKTeco Inc. ZKTeco ZKBioSecurity. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-551
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Jul 27, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
ZKTeco Inc. ZKTeco ZKBioSecurity zkteco:zkbiosecurity (from the name) | 3.0.1.0_R_230 | CNA record |
References
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5366.phpthird-party-advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/116485vdb-entry
- https://packetstormsecurity.com/files/138573exploit
- https://www.vulncheck.com/advisories/zkteco-zkbiosecurity-user-enumeration-via-authloginactionthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.