CVE-2016-20031 (GCVE-0-2016-20031)
Vulnerability from cvelistv5
Published
2026-03-15 13:35
Modified
2026-03-16 14:20
Severity ?
6.8 (Medium) - CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE
  • CWE-798 - Use of Hard-coded Credentials
Summary
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.
References
Impacted products
Vendor Product Version
ZKTeco Inc. ZKTeco ZKBioSecurity Version: 3.0.1.0_R_230
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