CVE-2025-2767 — CRITICAL (9.6)

Vulnerability Description

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.

CVSS Score

9.6

CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Arista	Ng Firewall	17.1.1

Related Weaknesses (CWE)

CWE-79

References

https://www.zerodayinitiative.com/advisories/ZDI-25-181/Third Party Advisory

FAQ

What is CVE-2025-2767?

CVE-2025-2767 is a vulnerability with a CVSS score of 9.6 (CRITICAL). 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 Fire...

How severe is CVE-2025-2767?

CVE-2025-2767 has been rated CRITICAL with a CVSS base score of 9.6/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2025-2767?

Check the references section above for vendor advisories and patch information. Affected products include: Arista Ng Firewall.