What is CVE-2026-25621?

CVE-2026-25621 is a medium-severity vulnerability in Arista Ng Firewall, classified under OS Command Injection. CVSS score: 6.0/10. Published 2026-06-05.

How severe is CVE-2026-25621?

Medium severity. CVSS v3 base score is 6.0 out of 10.

RCE in Arista Ng Firewall

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.

Vulnerability class: Command Injection (OS Command Injection)

Published 2026-06-05 · last modified 2026-07-23.

CVSS v3 metric

CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:L.

EPSS exploit prediction

EPSS: 0.004 (29.9th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 29.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002

Affected products

Arista Ng Firewall — versions 17.4

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

www.arista.com/en/support/advisories-notices/security-advisory/23399-security-a… (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-25621?: CVE-2026-25621 is a medium-severity vulnerability in Arista Ng Firewall, classified under OS Command Injection. CVSS score: 6.0/10. Published 2026-06-05.
How severe is CVE-2026-25621?: Medium severity. CVSS v3 base score is 6.0 out of 10.