CVE-2026-25621: A Reports application infrastructure vulnerability exists in Arista Edge Threat Management - Arista Next Gener

Routine

MEDIUM 6.0DOWNGRADE

CVE-2026-25621 is a medium-severity flaw (CVSS 6.0) affecting ng firewall. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A Reports application infrastructure vulnerability exists in Arista Edge Threat Management - Arista Next Generation Firewall (NGFW) due to insecure input validation. This issue uniquely affects version 17.4.0; earlier software releases are not exposed.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.0 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.2% (top 87%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-06-05
Last modified	2026-07-23

Publisher (CNA): Arista Networks, Inc. · Vendor: arista

Last updated 2026-07-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-05 20:17 UTCPublished CVE record published
2026-07-23 07:10 UTCUpdated Record last modified

arista ng firewall DOWNGRADE

Affected: 17.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 17.4

1. Check installed version

apt-cache policy ng-firewall || rpm -q ng-firewall || ng-firewall --version

2. No fixed release: DOWNGRADE to a release before 17.4 (Debian / Ubuntu)

apt-cache madison ng-firewall sudo apt install ng-firewall=<VERSION_BEFORE_17.4> sudo apt-mark hold ng-firewall

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ng-firewall sudo dnf downgrade ng-firewall-<VERSION_BEFORE_17.4> sudo dnf versionlock add ng-firewall

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-25621?

ng firewall: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-25621 being exploited?

CVE-2026-25621 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-25621 affect?

CVE-2026-25621 affects ng firewall. Severity is medium (CVSS 6.0). A Reports application infrastructure vulnerability exists in Arista Edge Threat Management - Arista Next Generation Firewall (NGFW) due to insecure input validation. This issue uniquely affects version 17.4.0; earlier software releases are

How urgent is CVE-2026-25621?

Priority 24/100. No elevated risk signals yet.

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References

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