Is CVE-2026-25621 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-25621 being exploited in the wild.

How severe is CVE-2026-25621?

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-2026-25621?

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-2026-25621 attacked?

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

Am I affected by CVE-2026-25621?

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-2026-25621: Arista NGFW OS command injection in Reports application

CVE-2026-25621 · Severity: medium · CVSS 6 · Published 2026-06-05

A security vulnerability exists in the reporting component of Arista Next Generation Firewalls, which are used to secure corporate network perimeters. An attacker with administrative privileges could exploit this flaw to execute unauthorized commands on the system due to improper data handling. This could lead to the theft of sensitive configuration data or partial disruption of the firewall's management functions.

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

Quick answers

Is CVE-2026-25621 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-25621 being exploited in the wild.
How severe is CVE-2026-25621?: 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-2026-25621?: 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-2026-25621 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-25621?: 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 in the Reports application infrastructure of Arista Edge Threat Management (NGFW). The root cause is insecure input validation of parameters passed to the reporting engine. An attacker with high-privileged (administrative) access can exploit this over the network to execute arbitrary commands on the underlying operating system. While the attack requires authentication, it allows for significant data exfiltration and potential impact on system integrity. This vulnerability is unique to version 17.4.0; earlier versions are reportedly 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/23399-security-advisory-0133

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