Is CVE-2026-25620 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-25620 being exploited in the wild.

How severe is CVE-2026-25620?

Medium severity, with a CVSS score of 6, published 5 June 2026.

Which products and versions are affected?

Arista Networks Next Generation Firewall 17.4.0.

Is there a fix for CVE-2026-25620?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-25620 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-25620?

Check whether you run Arista Networks Next Generation Firewall at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-25620: Arista NGFW command injection in Captive Portal

CVE-2026-25620 · Severity: medium · CVSS 6 · Published 2026-06-05

A security vulnerability exists in the Arista Next Generation Firewall, a device used to secure corporate networks and manage user access. An attacker with high-level administrative privileges could execute unauthorized commands on the system through the Captive Portal framework. This could lead to unauthorized access to sensitive data or disruption of network security services.

Technologies: Arista Networks Next Generation Firewall. Vendors: Arista Networks.

Quick answers

Is CVE-2026-25620 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-25620 being exploited in the wild.
How severe is CVE-2026-25620?: Medium severity, with a CVSS score of 6, published 5 June 2026.
Which products and versions are affected?: Arista Networks Next Generation Firewall 17.4.0.
Is there a fix for CVE-2026-25620?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-25620 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-25620?: Check whether you run Arista Networks Next Generation Firewall at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An OS command injection vulnerability (CWE-78) exists within the Captive Portal application framework of Arista Edge Threat Management. The flaw is located in the handling of encrypted passwords, where improper neutralization of special elements allows for command execution. This vulnerability is network-reachable but requires high privileges (PR:H) to exploit. Successful exploitation allows an attacker to execute arbitrary commands on the underlying operating system, potentially leading to full system compromise. This issue is specific to version 17.4.0; earlier versions are not affected.

Affected products

Arista Networks Next Generation Firewall (NGFW) 17.4.0

Timeline

2026-06-05: advisory: Initial advisory published by Arista Networks
2026-06-05: disclosed

References

https://www.arista.com/en/support/advisories-notices/security-advisory/22867-security-advisory-0133

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