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TI-2017-12294 Aliases CVE-2017-16726GHSA-3pcw-vp3f-6hvh

Improper authorization in ICS-CERT Beckhoff TwinCAT

Priority MEDIUM 40CWE-285Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass, Information disclosure
Confidentiality · integrity · availability
High · High · None
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-285 and CWE-326.

Summary

Beckhoff TwinCAT supports communication over ADS. ADS is a protocol for industrial automation in protected environments. ADS has not been designed to achieve security purposes and therefore does not include any encryption algorithms because of their negative effect on performance and throughput. An attacker can forge arbitrary ADS packets when legitimate ADS traffic is observable.

Why it matters now

EPSS 0.00508 43rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ICS-CERTBeckhoff TwinCATVersion 2, Version 3—No fix listedCNA
  • Beckhoff TwinCAT VendorICS-CERT Affected Version 2, Version 3 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:beckhoff:twincat:-:*:*:*:*:*:*:*not specified by NVDVulnerableBeckhoff
  • cpe:2.3:a:beckhoff:twincat:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Beckhoff

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-16726
  2. 2026-10-03 Alias added: GHSA-3pcw-vp3f-6hvh

References

Advisory 1

  • TI-2011-03066 Beckhoff TwinCAT 2.11.0.2004 and earlier allows remote attackers to cause a denial of… CVSS 2.0MEDIUM 5.0
  • TI-2019-12580 Beckhoff Embedded Windows PLCs through 3.1.4024.0, and Beckhoff Twincat on Windows… CVSS 3.1CRITICAL 9.8
  • TI-2014-04414 Beckhoff Embedded PC Images and TwinCAT Components Improper Restriction of Excessive Authentication Attempts CVSS 3.1CRITICAL 9.1
  • TI-2014-04415 Beckhoff Embedded PC Images and TwinCAT Components Exposed Dangerous Method or Function CVSS 3.1CRITICAL 9.1
  • TI-2019-04001 Beckhoff TwinCAT Profinet Driver Divide-by-Zero Denial of Service CVSS 3.1HIGH 7.5
  • TI-2019-04000 Beckhoff TwinCAT Discovery Service Denial of Service CVSS 3.1HIGH 7.5
See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences