What is CVE-2026-25624?

CVE-2026-25624 is a medium-severity vulnerability in Arista Ng Firewall, classified under Cross-site Scripting. CVSS score: 5.7/10. Published 2026-06-05.

How severe is CVE-2026-25624?

Medium severity. CVSS v3 base score is 5.7 out of 10.

XSS in Arista Ng Firewall

CVE-2026-25624

An administrative cross-site scripting (XSS) vulnerability exists in the web user interface dashboard layout of Arista Edge Threat Management - Arista Next Generation Firewall (NGFW). Unvalidated user-supplied variables are echoed back to administrative profiles, facilitating vector payload processing behavior controls.

Vulnerability class: XSS (Cross-Site Scripting)

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

CVSS v3 metric

CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:L.

EPSS exploit prediction

EPSS: 0.003 (17.2th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.2% 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: 0.003 · change: +0.001

Affected products

Arista Ng Firewall

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

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

Frequently asked questions

What is CVE-2026-25624?: CVE-2026-25624 is a medium-severity vulnerability in Arista Ng Firewall, classified under Cross-site Scripting. CVSS score: 5.7/10. Published 2026-06-05.
How severe is CVE-2026-25624?: Medium severity. CVSS v3 base score is 5.7 out of 10.