CVE-2016-20030 PUBLISHED

ZKTeco ZKBioSecurity 3.0 User Enumeration via authLoginAction

Assigner: VulnCheck
Reserved: 15.03.2026 Published: 15.03.2026 Updated: 15.03.2026

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 Vector: 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
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	ZKTeco Inc.
Product	ZKTeco ZKBioSecurity
Versions	Version 3.0.1.0_R_230 is affected

CVE-2016-20030 PUBLISHED

ZKTeco ZKBioSecurity 3.0 User Enumeration via authLoginAction

Metrics

Product Status

Credits

References

Problem Types