What is CVE-2016-20030?

CVE-2016-20030 is a critical-severity vulnerability in Zkteco Inc. Zkbiosecurity, classified under CWE-551. CVSS score: 9.8/10. Published 2026-03-15.

How severe is CVE-2016-20030?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Zkteco Inc. Zkbiosecurity

CVE-2016-20030

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 authLoginA…

EPSS: 0.000 (13.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Zkteco Inc. Zkbiosecurity — versions 3.0.1.0_R_230

Weakness classification (CWE)

CWE-551

References

Zero Science Lab Disclosure (third-party-advisory)
IBM X-Force Exchange (vdb-entry)
Packet Storm Security (exploit)
VulnCheck Advisory: ZKTeco ZKBioSecurity 3.0 User Enumeration via authLoginAction (third-party-advisory)

Frequently asked questions

What is CVE-2016-20030?: CVE-2016-20030 is a critical-severity vulnerability in Zkteco Inc. Zkbiosecurity, classified under CWE-551. CVSS score: 9.8/10. Published 2026-03-15.
How severe is CVE-2016-20030?: Critical severity. CVSS v3 base score is 9.8 out of 10.