CVE-2021-25910
CVE-2021-25910 is a high-severity vulnerability in Zivautomation 4cct-ea6-334126bf Firmware with a CVSS 3.x base score of 8.0. 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-287.
Key facts
- Severity: High (CVSS 3.x base score 8.0)
- CVSS v2: 3.3
- EPSS exploit prediction: 0% (37th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-287
- Affected product: Zivautomation 4cct-ea6-334126bf Firmware
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2021-25910?
- 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.
- How severe is CVE-2021-25910?
- CVE-2021-25910 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-25910 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-25910?
- CVE-2021-25910 affects Zivautomation 4cct-ea6-334126bf Firmware. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-25910?
- 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-2021-25910 published?
- CVE-2021-25910 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:3.23.77.8.33251:*:*:*:*:*:*:*
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Other CWE-287 (Improper Authentication) vulnerabilities
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- CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
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- CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
- CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
- CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…
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