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CVE-2016-20030

CRITICAL

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/16/2026

Last Modified3/16/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-551

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/116485(disclosure@vulncheck.com)

https://packetstormsecurity.com/files/138573(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/zkteco-zkbiosecurity-user-enumeration-via-authloginaction(disclosure@vulncheck.com)

https://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5366.php(disclosure@vulncheck.com)

IOC Correlations

No correlations recorded

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