CVE-2016-20031
5.5 MEDIUMZKTeco ZKBioSecurity 3.0 contains a local authorization bypass vulnerability in visLogin.jsp that allows attackers to authenticate withou...
Published: 2026-03-16 · Last updated: 2026-06-08
Severity and scoring
- CVSS
- 5.5 MEDIUM
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- CWE
- CWE-798
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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2016-20031
- [Other]https://cxsecurity.com/issue/WLB-2016090003
- [Other]https://exchange.xforce.ibmcloud.com/vulnerabilities/116488
- [Other]https://packetstormsecurity.com/files/138571
- [Other]https://www.exploit-db.com/exploits/40327/
- [Other]https://www.vulncheck.com/advisories/zkteco-zkbiosecurity-local-authorization-bypass-via-vislogin-jsp
- [Other]https://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5367.php
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