CVE-2016-20031
MEDIUM EPSS 4.5%
Published Mar 16, 20263mo ago · Modified Jun 8, 20263w ago
6.8 CVSS 4.0
Published Mar 16, 2026 3mo ago
Last Modified Jun 8, 2026 3w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
4.5% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-798 Use of Hard-coded Credentials Authentication
References 6
- cxsecurity.com https://cxsecurity.com/issue/WLB-2016090003
- exchange.xforce.ibmcloud.com https://exchange.xforce.ibmcloud.com/vulnerabilities/116488
- packetstormsecurity.com https://packetstormsecurity.com/files/138571
- exploit-db.com https://www.exploit-db.com/exploits/40327/
- vulncheck.com https://www.vulncheck.com/advisories/zkteco-zkbiosecurity-local-authorization-bypass-via-vislogin-jsp
- zeroscience.mk https://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5367.php
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.