PT-2026-25729 · Undefined · Undefined

Published 2026-03-15 · Updated 2026-06-08 · CVE-2016-20031

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions ZKTeco ZKBioSecurity version 3.0

Description The software contains a local authorization bypass in the visLogin.jsp component. This allows attackers to authenticate without valid credentials by spoofing localhost requests. The EnvironmentUtil.getClientIp() method incorrectly treats the IPv6 loopback address 0:0:0:0:0:0:0:1 as 127.0.0.1. Attackers can then authenticate using the IP address as the username with a hardcoded password of 123456, gaining access to sensitive information and performing unauthorized actions.

Recommendations Versions prior to 3.0 should be used.

Fix

Using Hardcoded Credentials

Weakness Enumeration

CWE-798

Related Identifiers

CVE-2016-20031

Affected Products

Undefined

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2016-20031 · Security Note
• https://t.me/CVEtracker/47432 · Telegram Post
• https://exchange.xforce.ibmcloud.com/vulnerabilities/116488 · Note
• https://vulncheck.com/advisories/zkteco-zkbiosecurity-local-authorization-bypass-via-vislogin-jsp · Note
• https://zeroscience.mk/en/vulnerabilities/ZSL-2016-5367.php · Note
• https://packetstormsecurity.com/files/138571 · Note
• https://cxsecurity.com/issue/WLB-2016090003 · Note
• https://t.me/cveNotify/166540 · Telegram Post
• https://exploit-db.com/exploits/40327 · Note