CVE-2021-25910

Name: CVE-2021-25910
Creator: NVD / NIST
Published: 2021-01-29T14:15:12.467+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.46%

Last modified Jun 17, 2026

CVE-2021-25910 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Improper Authentication vulnerability in the cookie parameter of ZIV AUTOMATION 4CCT-EA6-334126BF allows a local attacker to perform modifications in several parameters of the affected device as an authenticated user.. EPSS estimates a 0.46% chance of exploitation in the next 30 days.

Description

Improper Authentication vulnerability in the cookie parameter of ZIV AUTOMATION 4CCT-EA6-334126BF allows a local attacker to perform modifications in several parameters of the affected device as an authenticated user.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.46%

36.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Zivautomation	4cct-Ea6-334126bf Firmware	3.23.77.8.33251

References

https://www.incibe-cert.es/en/early-warning/ics-advisories/4cct-vulnerable-improper-authenticationThird Party Advisory
https://www.incibe-cert.es/en/early-warning/ics-advisories/4cct-vulnerable-improper-authenticationThird Party Advisory

Timeline

Published: Jan 29, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-25910?

How severe is CVE-2021-25910?

CVE-2021-25910 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.46% probability of exploitation in the next 30 days.

How do I fix CVE-2021-25910?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-25910?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST