Remote Code Execution Vulnerability in ZKTeco ZKBioSecurity 3.0
CVE-2016-20026

9.3CRITICAL

Key Information:

Vendor

Zkteco Inc.

Status
Zkteco ZkbiOSecurity
Vendor
CVE Published:
15 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2016-20026?

ZKTeco ZKBioSecurity 3.0 contains hardcoded credentials within its bundled Apache Tomcat server, enabling unauthenticated attackers to access the manager application. By utilizing these hardcoded credentials stored in tomcat-users.xml, attackers can upload harmful WAR archives embedded with JSP applications, thereby executing arbitrary code with SYSTEM privileges, posing a serious risk to the integrity and confidentiality of the system.

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Affected Version(s)

ZKTeco ZKBioSecurity 3.0.1.0_R_230

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2016-20026 - Proof of Concept

CVE-2016-20026 - Proof of Concept

References

https://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-53...
third-party-advisory
https://cxsecurity.com/issue/WLB-2016080266
third-party-advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/116484
vdb-entry

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

LiquidWorm as Gjoko Krstic of Zero Science Lab
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