ZDI-CAN-27007: ZDI-25-1019: Arista NG Firewall replace_marker Exposed Dangerous Function Authentication Bypass Vulnerability

Published Nov 25, 2025

Updated

This vulnerability allows remote attackers to to bypass authentication on affected installations of Arista NG Firewall. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2025-6979.

Affected Software

1 affected component

Arista NG Firewall

Event History

Nov 25, 2025

Advisory Published

via ZDI·06:00 AM

Data Sourced

via ZDI·06:00 AM

Description

Frequently Asked Questions

What is the severity of ZDI-CAN-27007?

ZDI-CAN-27007 has a CVSS score that indicates a medium severity rating due to its ability to allow remote attackers to bypass authentication.

How do I fix ZDI-CAN-27007?

To fix ZDI-CAN-27007, update the Arista NG Firewall to the latest version that addresses this vulnerability.

What systems are affected by ZDI-CAN-27007?

ZDI-CAN-27007 affects installations of Arista NG Firewall.

What are the potential impacts of ZDI-CAN-27007?

Exploitation of ZDI-CAN-27007 can lead to unauthorized access to the affected system.

Is user interaction required to exploit ZDI-CAN-27007?

Yes, user interaction is required as the target must visit a malicious page or open a malicious file for exploitation.

Company

Resources

Contact

SecAlerts Pty Ltd.
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Fortitude Valley,
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info@secalerts.co

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