ZIV AUTOMATION 4CCT Denial of Service vulnerability

published 2021-01-29 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-12780

cvss: 8.6; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.3%; EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits: 0; none known

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.

Exploit prediction

1.31% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

ZIV AUTOMATION 4CCT-EA6-334126BF

Classification

Weakness

CWE-400 Uncontrolled Resource Consumption

References

incibe-cert.es /en/early-warning/ics-advisories/4cct-vulnerable-denial-service-attack
third-party-advisory

Sources

CVE List CVE-2021-25909
NVD CVE-2021-25909

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Summary