How severe is CVE-2026-25621?

CVE-2026-25621 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability low.

Is CVE-2026-25621 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25621?

CVE-2026-25621 affects Arista Ng Firewall. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25621?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-25621 have an EU (EUVD) identifier?

Yes. CVE-2026-25621 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34905.

When was CVE-2026-25621 published?

CVE-2026-25621 was published on 2026-06-05 and last updated on 2026-07-23.

CVE-2026-25621

CVE-2026-25621 is a medium-severity vulnerability in Arista Ng Firewall with a CVSS 3.x base score of 6.0. 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-78.

Key facts

Severity: Medium (CVSS 3.x base score 6.0)
CVSS v4: 7.0
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-34905
Weakness: CWE-78
Affected product: Arista Ng Firewall
Published: 2026-06-05
Last modified: 2026-07-23

Description

A Reports application infrastructure vulnerability exists in Arista Edge Threat Management - Arista Next Generation Firewall (NGFW) due to insecure input validation. This issue uniquely affects version 17.4.0; earlier software releases are not exposed.

Frequently asked questions

What is CVE-2026-25621?: A Reports application infrastructure vulnerability exists in Arista Edge Threat Management - Arista Next Generation Firewall (NGFW) due to insecure input validation. This issue uniquely affects version 17.4.0; earlier software releases are not exposed.
How severe is CVE-2026-25621?: CVE-2026-25621 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability low.
Is CVE-2026-25621 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25621?: CVE-2026-25621 affects Arista Ng Firewall. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25621?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-25621 have an EU (EUVD) identifier?: Yes. CVE-2026-25621 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34905.
When was CVE-2026-25621 published?: CVE-2026-25621 was published on 2026-06-05 and last updated on 2026-07-23.

References

https://www.arista.com/en/support/advisories-notices/security-advisory/23399-security-advisory-0133

Affected products (1)

cpe:2.3:a:arista:ng_firewall:17.4:*:*:*:*:*:*:*

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