Vulnerabilities CVE-2016-20031

CVE-2016-20031

Medium

Open

TLP:CLEAR

ZKTeco ZKBioSecurity 3.0 Local Authorization Bypass via visLogin.jsp

NVD CVE.org

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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.

Details

CVSS Score: 6.8
EPSS Score ⓘ: 0.15%

4.6th percentile
CVSS Vector: 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
Confidence: 90%
Published: Mar 15, 2026
Last Modified: Jul 28, 2026

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