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PatchSiren cyber security CVE debrief

CVE-2020-7052 Festo CVE debrief

CVE-2020-7052 describes an availability issue in CODESYS components used with Festo Automation Suite. The advisory says affected CODESYS Control V3, Gateway V3, and HMI V3 versions before 3.5.15.30 can perform uncontrolled memory allocation, which may lead to a remote denial of service.

Vendor
Festo
Product
Unknown
CVSS
MEDIUM 6.5
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

Administrators and operators running Festo Automation Suite or embedded CODESYS components in industrial environments should review this issue, especially where CODESYS Control V3, Gateway V3, or HMI V3 are exposed on reachable networks.

Technical summary

According to the advisory, CODESYS Control V3, Gateway V3, and HMI V3 before 3.5.15.30 can allocate memory without proper control. The published CVSS vector indicates network reachability, low privileges, no user interaction, and an availability-only impact, so the main risk is service disruption rather than data compromise.

Defensive priority

Medium priority: the issue is limited to denial of service, but the network-exploitable path and ICS context make timely patching important for uptime and resilience.

Recommended defensive actions

  • Update CODESYS components to a patched version at or above 3.5.15.30.
  • If using Festo Automation Suite, move to version 2.8.0.138 or later and follow Festo's updated installation model for CODESYS.
  • Download and install CODESYS updates only from the official CODESYS website, following the vendor's installation guidance.
  • Keep the Festo Automation Suite connector current and monitor CODESYS and Festo security advisories for subsequent fixes.

Evidence notes

The supplied CISA CSAF advisory (ICSA-26-076-01) was first published on 2026-02-26 and republished on 2026-03-17, with the revision history noting republication of Festo SE & Co. KG advisory FSA-202601. The advisory metadata and notes identify the affected scope as CODESYS Control V3, Gateway V3, and HMI V3 before 3.5.15.30, and the remediation section states that Festo Automation Suite 2.8.0.138 no longer bundles CODESYS. No KEV listing is present in the provided corpus.

Sources and references

Verified primary and authoritative sources

  • CVE-2020-7052 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2020-7052

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

  • CVE-2020-7052 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2020-7052

    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.