CVE-2016-20026

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.

CVSS v4.0

9.3 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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

CVSS v3.1

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.78% chance of exploitation in the next 30 days, 53th percentile

Published

2026-03-15

Updated

2026-07-28

Proof-of-concept exploits (2)

• https://packetstormsecurity.com/files/138567
• https://www.exploit-db.com/exploits/40324/

References

• CVE Record
• NVD entry

Related

• CVE-2016-20025
• CVE-2016-20027
• CVE-2016-20024
• CVE-2016-20028
• CVE-2016-20018
• CVE-2016-20029