CVE-2016-20031

MediumCVSS 5.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-798

Affected software

No affected versions have been published.

Timeline

Published: Mar 16, 2026
Last modified: Jun 17, 2026
NVD status: Deferred

Related CVEs from 2016

CVE-2016-200327.2ZKTeco ZKAccess Security System 5.3.1 contains a stored cross-site scripting vulnerability that allows attackers to execute arbitrary HTML a CVE-2016-200337.8Wowza Streaming Engine 4.5.0 contains a local privilege escalation vulnerability that allows authenticated users to escalate privileges by r CVE-2016-200348.0Wowza Streaming Engine 4.5.0 contains a privilege escalation vulnerability that allows authenticated read-only users to elevate privileges t CVE-2016-200354.3Wowza Streaming Engine 4.5.0 contains a cross-site request forgery vulnerability that allows attackers to perform administrative actions by CVE-2016-200366.1Wowza Streaming Engine 4.5.0 contains multiple reflected cross-site scripting vulnerabilities in the enginemanager interface where input pas CVE-2016-200378.4xwpe 1.5.30a-2.1 and prior contains a stack-based buffer overflow vulnerability that allows local attackers to execute arbitrary code by sup CVE-2016-200388.4yTree 1.94-1.1 contains a stack-based buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying an ex CVE-2016-200398.4Multi Emulator Super System 0.154-3.1 contains a buffer overflow vulnerability in the gamma parameter handling that allows local attackers t CVE-2016-20049.8HPE Data Protector before 7.03_108, 8.x before 8.15, and 9.x before 9.06 allow remote attackers to execute arbitrary code via unspecified ve CVE-2016-200408.4TiEmu 3.03-nogdb+dfsg-3 contains a buffer overflow vulnerability in the ROM parameter handling that allows local attackers to crash the appl CVE-2016-200418.4Yasr 0.6.9-5 contains a buffer overflow vulnerability that allows local attackers to crash the application or execute arbitrary code by supp CVE-2016-200428.4TRN 3.6-23 contains a stack buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying an oversized ar