CVE-2016-20031
ZKTeco ZKBioSecurity 3.0 Local Authorization Bypass via visLogin.jsp
- State
- Published
- Severity
- 6.8 Medium
- Published
- Mar 15, 2026
- Updated
- Jul 28, 2026
- Reserved
- Mar 15, 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 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 | VulnCheck |
| 3.1 | 5.5 Medium | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-798 Use of Hard-coded Credentials
Affected Products
| Product | Versions |
|---|---|
ZKTeco ZKBioSecurityZKTeco Inc. |
|
References
- Zero Science Lab Disclosurethird-party-advisory
- CXSecuritythird-party-advisory
- IBM X-Force Exchangevdb-entry
- Packet Storm Securityexploit
- Referenceexploit
- VulnCheck Advisory: ZKTeco ZKBioSecurity 3.0 Local Authorization Bypass via visLogin.jspthird-party-advisory
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