CVE-2021-25909
CVE-2021-25909 is a high-severity vulnerability in Zivautomation 4cct-ea6-334126bf Firmware with a CVSS 3.x base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.
Key facts
- Severity: High (CVSS 3.x base score 8.6)
- CVSS v2: 5.0
- EPSS exploit prediction: 1% (67th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-400
- Affected product: Zivautomation 4cct-ea6-334126bf Firmware
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2021-25909?
- 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.
- How severe is CVE-2021-25909?
- CVE-2021-25909 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2021-25909 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-25909?
- CVE-2021-25909 affects Zivautomation 4cct-ea6-334126bf Firmware. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-25909?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2021-25909 published?
- CVE-2021-25909 was published on 2021-01-29 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:o:zivautomation:4cct-ea6-334126bf_firmware:3.23.80.27.36371:*:*:*:*:*:*:*
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