Is CVE-2016-20026 in the CISA KEV catalog?

No. CVE-2016-20026 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-20026?

CVE-2016-20026 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2016-20026?

CVE-2016-20026 has an EPSS score of 0.78% (51th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2016-20026

CRITICAL

9.8

CVSS v3

NVD

Description

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-798Hard-coded Credentials

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.78%probability of exploitation in 30 days

51stpercentile

Moderate risk: more likely to be exploited than 51% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-08.