CVE-2025-2767: Arista NG Firewall

Critical severity, CVSS 9.6. EPSS: 0.6% chance of exploitation in the next 30 days.

Arista NG Firewall User-Agent Cross-Site Scripting Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Arista NG Firewall. Minimal user interaction is required to exploit this vulnerability. The specific flaw exists within the processing of the User-Agent HTTP header. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of an arbitrary script. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-24407.

Affected products

• Arista NG Firewall: version 17.1.1 only

Published 2025-04-23. Last modified 2026-06-17.