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PatchSiren cyber security CVE debrief

CVE-2020-12067 Festo CVE debrief

CVE-2020-12067 is a high-severity password-management flaw in a CODESYS-based industrial engineering environment. The supplied advisory corpus describes an attacker changing a user’s password without knowing the current password, which can undermine account integrity and access control. The advisory was published on 2026-02-26 and revised on 2026-03-17. Because the supplied source metadata contains inconsistent product labeling, the safest interpretation is to treat this as a CODESYS-related issue affecting the listed Festo Automation Suite / bundled CODESYS versions until vendor guidance is confirmed.

Vendor
Festo
Product
Unknown
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2025-09-30
Original CVE updated
2025-11-13
Advisory published
2025-09-30
Advisory updated
2025-11-13

Who should care

Industrial automation teams, OT/ICS administrators, and support staff running Festo Automation Suite or other affected CODESYS-based engineering tools should care. Any environment that relies on these tools for access-controlled configuration or engineering workstations should prioritize review and patching.

Technical summary

The advisory states that in a CODESYS-based component, a user’s password may be changed by an attacker without knowledge of the current password. The provided CVSS vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N) indicates network-reachable impact with no privileges or user interaction required and a primary integrity impact. The supplied remediation guidance ties the issue to Festo Automation Suite versions before 2.8.0.138 and recommends installing the latest patched CODESYS release separately, because CODESYS is no longer bundled starting with Festo Automation Suite 2.8.0.138.

Defensive priority

High. The issue is remotely reachable, requires no authentication or user interaction according to the supplied CVSS vector, and can directly affect account integrity. Prioritize patching in any exposed engineering or maintenance environment.

Recommended defensive actions

  • Update Festo Automation Suite to version 2.8.0.138 or later.
  • Install the latest patched CODESYS release directly from the official CODESYS website.
  • Follow the vendor installation and update instructions to ensure all security fixes are applied.
  • Keep the Festo Automation Suite connector up to date by applying Festo updates as they are released.
  • Monitor CODESYS and Festo security advisories for follow-on fixes or compatibility notes.

Evidence notes

Primary evidence comes from the supplied CISA CSAF advisory record for ICSA-26-076-01 (published 2026-02-26; revised 2026-03-17), which lists the issue description, the affected Festo Automation Suite/CODESYS product set, the CVSS vector, and the mitigation guidance. The source corpus also includes official reference URLs for the CVE record, CISA advisory, CODESYS/Festo advisory pages, and a CWE-640 reference. The vendor/product metadata in the supplied corpus is inconsistent, so claims are limited to what is explicitly stated in the advisory record and its references.

Sources and references

Verified primary and authoritative sources

  • CVE-2020-12067 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2020-12067

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2020-12067 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2020-12067

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2025/icsa-25-273-04.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-273-04

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/sites/default/files/publications/emailscams0905.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ncas/tips/ST04-014

    Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.