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CVE-2016-20031— ZKTeco ZKBioSecurity 3.0 Local Authorization Bypass via visLogin.jsp

Quick assessment

Affected
ZKTeco Inc. ZKTeco ZKBioSecurity
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ZKTeco ZKBioSecurity是中国ZKTeco公司的一个基于 Web 的一体式平台。 ZKTeco ZKBioSecurity 3.0版本存在信任管理问题漏洞，该漏洞源于本地授权绕过，可能导致攻击者通过伪造本地主机请求未经有效凭证进行身份验证。

CVSS 5.5 · Medium EPSS 0.15% · P4

Affected Version Matrix 1

VendorProduct Version RangeStatus
ZKTeco Inc. ZKTeco ZKBioSecurity 3.0.1.0_R_230 affected
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I. Basic Information for CVE-2016-20031

Vulnerability Information
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Vulnerability Title
ZKTeco ZKBioSecurity 3.0 Local Authorization Bypass via visLogin.jsp
Source: CVE Program / CVE List V5
Vulnerability 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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用硬编码的凭证
Source: CVE Program / CVE List V5
Vulnerability Title
ZKTeco ZKBioSecurity 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ZKTeco ZKBioSecurity是中国ZKTeco公司的一个基于 Web 的一体式平台。 ZKTeco ZKBioSecurity 3.0版本存在信任管理问题漏洞，该漏洞源于本地授权绕过，可能导致攻击者通过伪造本地主机请求未经有效凭证进行身份验证。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ZKTeco Inc. ZKTeco ZKBioSecurity 3.0.1.0_R_230 -

II. Public POCs for CVE-2016-20031

# POC Description Source Link Shenlong Link
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default-local-qwen3.6 · 4973 chars
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III. Intelligence Information for CVE-2016-20031

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Vendor Advisories for CVE-2016-20031 (2)

Exploits & Public PoCs for CVE-2016-20031 (3)

Same Patch Batch · ZKTeco Inc. · 2026-03-15 · 9 CVEs total

CVE-2016-20026 9.8 CRITICAL ZKTeco ZKBioSecurity 3.0 Hardcoded Credentials Remote Code Execution
CVE-2016-20030 9.8 CRITICAL ZKTeco ZKBioSecurity 3.0 User Enumeration via authLoginAction
CVE-2016-20024 9.8 CRITICAL ZKTeco ZKTime.Net 3.0.1.6 Insecure File Permissions Privilege Escalation
CVE-2016-20025 8.8 HIGH ZKTeco ZKAccess Professional 3.5.3 Privilege Escalation via Insecure Permissions
CVE-2016-20032 7.2 HIGH ZKTeco ZKAccess Security System 5.3.1 Stored XSS
CVE-2016-20029 6.2 MEDIUM ZKTeco ZKBioSecurity 3.0 File Path Manipulation Vulnerability
CVE-2016-20027 6.1 MEDIUM ZKTeco ZKBioSecurity 3.0 Multiple Reflected XSS Vulnerabilities
CVE-2016-20028 4.3 MEDIUM ZKTeco ZKBioSecurity 3.0 Cross-Site Request Forgery Superadmin

IV. Related Vulnerabilities

Same product: ZKTeco ZKBioSecurity
Same vendor: ZKTeco Inc.
Same weakness: CWE-798

V. Comments for CVE-2016-20031

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