CVE-2026-25620
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedAn 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.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceA command injection vulnerability exists in the Captive Portal framework of Arista NGFW version 17.4.0, specifically in the encrypted password handling mechanism. An attacker with access to the Captive Portal functionality can inject arbitrary commands through manipulated encrypted password parameters, potentially achieving remote code execution on the firewall appliance.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 17.4CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:L
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify installed Arista Ng Firewall versionAccess the management interface or CLI and retrieve the software version. On the command line, this is typically shown by commands like 'system status' or available via the web UI dashboard.Affected if The installed version is 17.4.0 or 17.4 (exact match only, other versions are not affected)
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Verify Captive Portal feature statusNavigate to the Arista Edge Threat Management NGFW configuration panel and locate the Captive Portal settings. Check whether the feature is currently enabled or disabled.Affected if Captive Portal is enabled - the vulnerability exists only when this feature is active
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Inspect Captive Portal password configurationWithin the Captive Portal configuration section, examine the password-related settings. Look for any encrypted password entries or custom password configurations used for portal authentication.Affected if Encrypted passwords are configured in Captive Portal - the flaw relates to mishandling of encrypted passwords
You are affected only if your Arista Ng Firewall is exactly version 17.4 or 17.4.0, the Captive Portal feature is enabled, and you have encrypted passwords configured within Captive Portal settings.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpgrade to a patched version of Arista NGFW (either a newer version beyond 17.4.0 or a vendor-provided patch), as this vulnerability only affects the specific 17.4.0 release and earlier versions are not exposed.
- Consultation4.0 h
- Implementation8.0 h
- Testing12.0 h
- Review / QA4.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-25620 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-25620 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
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