CVE-2016-20030
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductZKTeco ZKBioSecurity
PublishedMar 16, 2026
First seenMar 16, 2026
Weakness typeCWE-551CWE-551
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| ZKTeco Inc. ZKTeco ZKBioSecurity | 3.0.1.0_R_230 | — |
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