CVE-2016-20026
ZKTeco ZKBioSecurity 3.0 Hardcoded Credentials Remote Code Execution
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-798 |
| Vendor | zkteco inc. |
| Product | zkteco zkbiosecurity |
| Published | Mar 15, 2026 |
| Last Updated | Apr 7, 2026 |
Stay Ahead of the Next One
Get instant alerts for zkteco inc. zkteco zkbiosecurity
Be the first to know when new critical vulnerabilities affecting zkteco inc. zkteco zkbiosecurity are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
ZKTeco Inc. / ZKTeco ZKBioSecurity
3.0.1.0_R_230
References
zeroscience.mk: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5362.php cxsecurity.com: https://cxsecurity.com/issue/WLB-2016080266 exchange.xforce.ibmcloud.com: https://exchange.xforce.ibmcloud.com/vulnerabilities/116484 packetstormsecurity.com: https://packetstormsecurity.com/files/138567 exploit-db.com: https://www.exploit-db.com/exploits/40324/ vulncheck.com: https://www.vulncheck.com/advisories/zkteco-zkbiosecurity-hardcoded-credentials-remote-code-execution
Credits
LiquidWorm as Gjoko Krstic of Zero Science Lab