CVE-2026-25620: An encrypted password command injection vulnerability exists in the Captive Portal application framework of Ar

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MEDIUM 6.0DOWNGRADE

CVE-2026-25620 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.

An encrypted password command injection vulnerability exists in the Captive Portal application framework of Arista Edge Threat Management - Arista Next Generation Firewall (NGFW). This issue uniquely affects version 17.4.0; earlier software releases are not exposed.

Why this priority

EPSS top 4%: very likely to be exploited

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	9.9% (top 4%)
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-2026-25620?

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

Is CVE-2026-25620 being exploited?

CVE-2026-25620 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-2026-25620 affect?

CVE-2026-25620 affects ng firewall. Severity is medium (CVSS 6.0). An encrypted password command injection vulnerability exists in the Captive Portal application framework of Arista Edge Threat Management - Arista Next Generation Firewall (NGFW). This issue uniquely affects version 17.4.0; earlier software

How urgent is CVE-2026-25620?

Priority 45/100. EPSS top 4%: very likely to be exploited

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References

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