CVE-2026-25624 PUBLISHED

Arista Edge Threat Management NGFW UI Administrative Cross-Site Scripting

Assigner: Arista
Reserved: 03.02.2026 Published: 05.06.2026 Updated: 05.06.2026

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.

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:L
CVSS Score: 5.7

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	High	Integrity Impact	Low
User Interaction	Required	Availability Impact	Low

CVSS 3.1

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:H/VI:L/VA:L/SC:L/SI:L/SA:L
CVSS Score: 5.8

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	Low
Attack Complexity	Low	Integrity	Low	Integrity	Low
Attack Requirements	Present	Availability	Low	Availability	Low
Privileges Required	High
User Interaction	Passive

CVSS 4.0

Product Status

Vendor	Arista Networks
Product	Arista Edge Threat Management - Arista Next Generation Firewall (NGFW)
Versions	Default: unaffected affected from 0 to 17.4.0 (incl.)

Affected Configurations

A successful attack requires administrative privileges to target UI entry forms and relies on session interaction parsing from a secondary administrator browser window.

Workarounds

Per operational best practice security models, do not allow unauthorized administrative access to the administrative browser.

Solutions

The recommended resolution is to upgrade to NGFW Version 17.4.1 at your earliest convenience.

Credits

Jon Williams & Ronan Kervella from Bishop Fox finder

References

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

Problem Types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-Site Scripting') CWE

Impacts

CAPEC-63 Cross-Site Scripting (XSS)