What’s Vulnerable › Vulnerabilities

CVE-2021-25909: ZIV AUTOMATION 4CCT Denial of Service vulnerability

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-01-29 · updated 2026-06-17
• Weakness: CWE-400

Description

ZIV Automation 4CCT-EA6-334126BF firmware version 3.23.80.27.36371, allows an unauthenticated, remote attacker to cause a denial of service condition on the device. An attacker could exploit this vulnerability by sending specific packets to the port 7919.

Affected products

• ZIV AUTOMATION 4CCT-EA6-334126BF: 3.23.80.27.36371

References

• https://www.incibe-cert.es/en/early-warning/ics-advisories/4cct-vulnerable-denial-service-attack
• https://www.incibe-cert.es/en/early-warning/ics-advisories/4cct-vulnerable-denial-service-attack

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