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Cpx Cmxx FirmwareOperating system · Festo

CVE-2022-3079

HIGH · 7.5 CVSS v3.1 Published 2022-09-20
Fix available
A fix is available. Upgrade to after 2.0.12 or later.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click

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 · unedited
Festo control block CPX-CEC-C1 and CPX-CMXX in multiple versions allow unauthenticated, remote access to critical webpage functions which may cause a denial of service.

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 confidence

Festo CPX-CEC-C1 and CPX-CMXX control blocks contain an authentication bypass vulnerability in their web interface. The flaw allows unauthenticated, remote attackers to access critical webpage functions without credentials, potentially triggering denial of service conditions.

MitigationIsolate affected control blocks within a secured network segment, restrict web interface access to authorized personnel only, and apply vendor-provided firmware updates when available.

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
Cpx Cmxx FirmwareOperating system
Affected:<= 2.0.12
Cpx Cec C1 FirmwareOperating system
Affected:<= 1.2.34

CVSS 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
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify the firmware version of the Festo CPX-CMXX or CPX-CEC-C1 device
    Access the device's web interface or console and navigate to the firmware/version information page, or use the device's management interface to retrieve the current firmware version. Typical paths include System > Information or Status > Device Info.
    Affected if The installed firmware version is <= 2.0.12 for CPX-CMXX or <= 1.2.34 for CPX-CEC-C1
  2. Confirm the web interface is enabled on the device
    Log into the device's administration panel and navigate to Network Settings or Interface Configuration. Verify that the web server/HTTP interface is listed as enabled.
    Affected if The web interface is currently enabled and accessible
  3. Determine if the device web interface is exposed to the network
    From an external host, attempt to reach the device's IP address on HTTP (port 80) or HTTPS (port 443). Use a browser or curl command: curl -k http://[device-ip] or curl -k https://[device-ip]
    Affected if The web interface responds to requests from untrusted network segments
  4. Check for unauthorized access to protected web interface functions
    Review web server access logs or device event logs for requests to critical functions that would normally require authentication. Look for unusual patterns such as access to /admin, /config, or other protected endpoints without corresponding login events.
    Affected if There is evidence of unauthenticated access to normally-protected web interface functions in the logs

A user is affected if their Festo CPX-CMXX firmware is <= 2.0.12 or CPX-CEC-C1 firmware is <= 1.2.34 AND the device web interface is enabled and accessible from the network.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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.

dbcve · scoped
Upgrade available Upgrade to a release after 2.0.12
Interim mitigation

Isolate affected control blocks within a secured network segment, restrict web interface access to authorized personnel only, and apply vendor-provided firmware updates when available.

Recommended fix Moderate confidence

CPX-CMXX firmware > 2.0.12 and CPX-CEC-C1 firmware > 1.2.34 (obtain exact versions from Festo)

  1. Contact Festo directly or visit their official support website to obtain the latest firmware version for CPX-CMXX and CPX-CEC-C1 devices
  2. Verify the current firmware version of affected devices by accessing the device web interface or using Festo configuration tools
  3. Download the patched firmware from Festo's official support portal (typically found at festo.com/service or through your regional Festo representative)
  4. Follow Festo's official firmware update procedure documented in the device manual - this usually involves uploading the firmware file through the web interface or using Festo's configuration software
  5. After updating, verify the firmware version has changed and confirm the web interface is accessible
  6. As a compensating control, ensure affected devices are not directly exposed to the internet and are behind a properly configured firewall or network segmentation
Caveat Industrial设备固件更新可能需要重新配置设备参数，建议在维护窗口进行并备份当前配置

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Cpx Cmxx Firmware Scoped from the published advisory
  • Consultation6.0 h
  • Implementation12.0 h
  • Testing6.0 h
  • Review / QA4.0 h
28.0 hours of engineering $4,980
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-3079 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • 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
  • No spam, self-promotion, credentials, or personal data