Description

ZKTeco ZKBioSecurity 3.0 contains a local authorization bypass vulnerability in visLogin.jsp that allows attackers to authenticate without valid credentials by spoofing localhost requests. Attackers can exploit the EnvironmentUtil.getClientIp() method which treats IPv6 loopback address 0:0:0:0:0:0:0:1 as 127.0.0.1 and authenticates using the IP as username with hardcoded password 123456 to access sensitive information and perform unauthorized actions.

INFO

Published Date :

2026-03-15T13:35:35.350Z

Last Modified :

2026-03-16T14:20:19.921Z

Source :

VulnCheck
AFFECTED PRODUCTS

The following products are affected by CVE-2016-20031 vulnerability.

Vendors Products
Zkteco
  • Zkbiosecurity
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2016-20031.

URL Resource
https://cxsecurity.com/issue/WLB-2016090003 cve-icon cve-icon
https://exchange.xforce.ibmcloud.com/vulnerabilities/116488 cve-icon cve-icon
https://packetstormsecurity.com/files/138571 cve-icon cve-icon
https://www.exploit-db.com/exploits/40327/ cve-icon cve-icon
https://www.vulncheck.com/advisories/zkteco-zkbiosecurity-local-authorization-bypass-via-vislogin-jsp cve-icon cve-icon
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5367.php cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact