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CVE Vulnerability Details :
CVE-2016-20031
PUBLISHED
More InfoOfficial Page
Assigner-VulnCheck
Assigner Org ID-83251b91-4cc7-4094-a5c7-464a1b83ea10
View Known Exploited Vulnerability (KEV) details
Published At-15 Mar, 2026 | 13:35
Updated At-16 Mar, 2026 | 14:20
Rejected At-
▼CVE Numbering Authority (CNA)
ZKTeco ZKBioSecurity 3.0 Local Authorization Bypass via visLogin.jsp

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.

Affected Products
Vendor
ZKTeco Inc.
Product
ZKTeco ZKBioSecurity
Versions
Affected
  • 3.0.1.0_R_230
Problem Types
TypeCWE IDDescription
CWECWE-798Use of Hard-coded Credentials
Type: CWE
CWE ID: CWE-798
Description: Use of Hard-coded Credentials
Metrics
VersionBase scoreBase severityVector
4.06.8MEDIUM
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
3.15.5MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Version: 4.0
Base score: 6.8
Base severity: MEDIUM
Vector:
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
Version: 3.1
Base score: 5.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
finder
LiquidWorm as Gjoko Krstic of Zero Science Lab
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5367.php
third-party-advisory
https://cxsecurity.com/issue/WLB-2016090003
third-party-advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/116488
vdb-entry
https://packetstormsecurity.com/files/138571
exploit
https://www.exploit-db.com/exploits/40327/
exploit
https://www.vulncheck.com/advisories/zkteco-zkbiosecurity-local-authorization-bypass-via-vislogin-jsp
third-party-advisory
Hyperlink: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5367.php
Resource:
third-party-advisory
Hyperlink: https://cxsecurity.com/issue/WLB-2016090003
Resource:
third-party-advisory
Hyperlink: https://exchange.xforce.ibmcloud.com/vulnerabilities/116488
Resource:
vdb-entry
Hyperlink: https://packetstormsecurity.com/files/138571
Resource:
exploit
Hyperlink: https://www.exploit-db.com/exploits/40327/
Resource:
exploit
Hyperlink: https://www.vulncheck.com/advisories/zkteco-zkbiosecurity-local-authorization-bypass-via-vislogin-jsp
Resource:
third-party-advisory
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found