CVE-2016-20031

Medium CVSS: 6.8

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.

Vendor

Product

CWE

CWE-798

Yayın Tarihi

2026-03-16 14:17:49

Güncelleme

2026-03-16 14:53:46

Source Identifier

disclosure@vulncheck.com

KEV Date Added

Kategoriler

CWE-798 MEDIUM 2026

Referanslar

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