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TI-2016-09202 Aliases CVE-2016-20026GHSA-69cj-f4mg-xrg8

ZKTeco ZKBioSecurity 3.0 Hardcoded Credentials Remote Code Execution

Priority HIGH 81CWE-798Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-798.

Summary

ZKTeco ZKBioSecurity 3.0 contains hardcoded credentials in the bundled Apache Tomcat server that allow unauthenticated attackers to access the manager application. Attackers can authenticate with hardcoded credentials stored in tomcat-users.xml to upload malicious WAR archives containing JSP applications and execute arbitrary code with SYSTEM privileges.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00812 57th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ZKTecoZKTeco ZKBioSecurity3.0.1.0_R_230—No fix listedCNA
  • ZKTeco ZKBioSecurity VendorZKTeco Affected 3.0.1.0_R_230 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2016-20026
  2. 2026-10-03 Alias added: GHSA-69cj-f4mg-xrg8

References

Exploit 2

Advisory 1

  • TI-2023-20210 A path traversal vulnerability in the iclock API of ZKTeco BioTime v8.5.5 allows… KEVCVSS 3.1HIGH 7.5
  • TI-2025-28829 Hard-coded credentials in ZKTeco ZKBio CVSecurity CVSS 3.1CRITICAL 9.8
  • TI-2024-24297 ZKTeco ZKBio CVSecurity v6.1.1 was discovered to contain a hardcoded cryptographic key. CVSS 3.1CRITICAL 9.8
  • TI-2023-20211 ZKTeco BioTime 8.5.5 through 9.x before 9.0.1 (20240617.19506) allows authenticated… CVSS 3.1CRITICAL 9.8
  • TI-2016-09200 ZKTeco ZKTime.Net 3.0.1.6 Insecure File Permissions Privilege Escalation CVSS 4.0CRITICAL 9.3
  • TI-2016-09206 ZKTeco ZKBioSecurity 3.0 User Enumeration via authLoginAction CVSS 4.0CRITICAL 9.3
See all 70 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences