CVE-2016-20031
ZKTeco ZKBioSecurity 3.0 Local Authorization Bypass via visLogin.jsp
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.
INFO
Published Date :
March 15, 2026, 1:35 p.m.
Last Modified :
March 15, 2026, 1:35 p.m.
Remotely Exploit :
No
Source :
VulnCheck
Affected Products
The following products are affected by CVE-2016-20031
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 |
Solution
- Update ZKTeco ZKBioSecurity 3.0 software.
- Apply vendor patches when available.
- Restrict access to visLogin.jsp.
- Monitor network traffic for suspicious activity.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2016-20031 vulnerability anywhere in the article.