CVE-2016-20030
ZKTeco ZKBioSecurity 3.0 User Enumeration via authLoginAction
- State
- Published
- Severity
- 9.3 Critical
- Published
- Mar 15, 2026
- Updated
- Jul 28, 2026
- Reserved
- Mar 15, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-551 Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
Affected Products
| Product | Versions |
|---|---|
ZKTeco ZKBioSecurityZKTeco Inc. |
|
References
- Zero Science Lab Disclosurethird-party-advisory
- IBM X-Force Exchangevdb-entry
- Packet Storm Securityexploit
- VulnCheck Advisory: ZKTeco ZKBioSecurity 3.0 User Enumeration via authLoginActionthird-party-advisory
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