CVE-2016-20031
ZKTeco ZKBioSecurity 3.0 Local Authorization Bypass via visLogin.jsp
- Published
- Updated
- Reserved
- Assigned by
- VulnCheck
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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| VulnCheckCNA (assigner) | 4.0 | Medium6.8 | 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 |
| VulnCheckCNA (assigner) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVDNVD · Deferred | 4.0 | Medium6.8 | 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 |
- EPSS (exploitation in 30 days)
- 0.15% · top 95% of all CVEs (4 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.8.
Weakness
Affected products
ZKTeco Inc. · ZKTeco ZKBioSecurity
- affected 3.0.1.0_R_230
What to do
Solution: The affected software ZKBioSecurity and ZKAccess have been officially discontinued. It is recommended that users switch to using ZKBio CVSecurity software. ZKBio CVSecurity has fixed these vulnerabilities. It is recommended that customers use the latest version of ZKBio CVSecurity to eliminate risks.
References (6)
- Zero Science Lab Disclosure (opens in a new tab)third-party-advisory
- CXSecurity (opens in a new tab)third-party-advisory
- IBM X-Force Exchange (opens in a new tab)vdb-entry
- Packet Storm Security (opens in a new tab)exploit
- Reference (opens in a new tab)exploit
- VulnCheck Advisory: ZKTeco ZKBioSecurity 3.0 Local Authorization Bypass via visLogin.jsp (opens in a new tab)third-party-advisory
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2016-20031)Record last updated .