CVE-2022-3270
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 · uneditedIn multiple products by Festo a remote unauthenticated attacker could use functions of an undocumented protocol which could lead to a complete loss of confidentiality, integrity and availability.
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 confidenceFesto multiple products contain an undocumented protocol that allows remote unauthenticated attackers to execute functions leading to complete compromise of confidentiality, integrity, and availability. The vulnerability is exploitable remotely without authentication and carries a critical CVSS 9.8 severity rating.
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 dataall versionsall versionsall versionsall versionsall versionsall versionsall versionsall versionsCVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 Festo control devices on the networkInventory network-connected devices and check for Festo Bus Module Cpx E Ep or Bus Node Cpx Fb32/33/36/37/39/40/43 devices. Use network scanning tools (e.g., nmap, asset discovery) or check device nameplates and management interfaces for the exact model number.Affected if Any Festo Bus Module Cpx E Ep or Bus Node Cpx Fb32/33/36/37/39/40/43 device is present on the network.
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Verify device firmware versionAccess the device management interface (web UI, console, or management protocol) and retrieve the firmware version. Compare against the list: all versions of Cpx E Ep, Cpx Fb32, Cpx Fb33, Cpx Fb36, Cpx Fb37, Cpx Fb39, Cpx Fb40, Cpx Fb43.Affected if The device model matches any of the affected models regardless of firmware version (all versions are affected).
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Check for unusual open network servicesPerform a port scan (e.g., nmap) on the Festo device to identify all open ports and running services. Look for any undocumented or unexpected services listening on the network, particularly on ports not standard to Festo device management.Affected if Unexpected services or ports are open on the device, especially if they are not documented in the product manual.
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Assess network accessibility of the deviceDetermine if the Festo device is directly accessible from networks outside the trusted operational technology (OT) network. Check firewall rules, router configurations, and VLAN assignments to see if the device management interface or other ports are exposed to the internet or untrusted networks.Affected if The device has any IP reachability from untrusted networks (e.g., the internet, guest networks, or business IT networks without filtering).
You are affected if any Festo Bus Module Cpx E Ep or Bus Node Cpx Fb32/33/36/37/39/40/43 device is present on your network and is accessible from less-trusted network segments.
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 dataIsolate affected Festo devices from untrusted networks and restrict access to management interfaces until vendor patches are available; disable any unnecessary network services and implement network segmentation to limit exposure.
- Consultation8.0 h
- Implementation24.0 h
- Testing16.0 h
- Review / QA8.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-3270 — 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-2022-3270 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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