Priority reviewHigh

CVE-2026-25622

Arista Networks Arista Edge Threat Management - Arista Next Generation Firewall (NGFW), ng firewall

A Captive Portal Custom Handler command injection vulnerability exists in Arista Edge Threat Management - Arista Next Generation Firewall (NGFW). On affected platforms, an administrative account logged into the user interface can exploit this input handling behavior to execute arbitrary platform shell commands.

CVSS: 7
EPSS: 9.88%
CISA KEV: Not listed
Published: 2026.06.06

PRIORITY ASSESSMENT

Priority review

FIRST EPSS indicates an elevated probability of exploitation.

Known exploitationNot established by KEV

Exploit probability9.88%

Technical severityCVSS 7

Vulnerability overview

Affected product and versions

Product: Arista Networks Arista Edge Threat Management - Arista Next Generation Firewall (NGFW), ng firewall
Affected versions: <= 17.4.0, < 17.4.1
Fixed versions: 17.4.1

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Arista Networks Arista Edge Threat Management - Arista Next Generation Firewall (NGFW), ng firewall and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:L/VA:L/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:X/R:X/V:X/RE:X/U:X
CWE: CWE-78