TI-2019-12580 Aliases CVE-2019-16871 GHSA-2q68-c93j-vxw8

Beckhoff Embedded Windows PLCs through 3.1.4024.0, and Beckhoff Twincat on Windows…

MEDIUM 50CWE-290Published 2019-12-19 · Updated 2024-08-05

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-290.

Summary

Beckhoff Embedded Windows PLCs through 3.1.4024.0, and Beckhoff Twincat on Windows Engineering stations, allow an attacker to achieve Remote Code Execution (as SYSTEM) via the Beckhoff ADS protocol.

Why it matters now

EPSS 0.05302 92nd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

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

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:a:beckhoff:twincat::::::::	3.0 to before 3.1	Vulnerable	Beckhoff
cpe:2.3:a:beckhoff:twincat:2.0:::::::*	2.0	Vulnerable	Beckhoff
cpe:2.3:a:beckhoff:twincat:3.1:build_4022::::::	3.1 build_4022	Vulnerable	Beckhoff
cpe:2.3:a:beckhoff:twincat:3.1:build_4024.0::::::	3.1 build_4024.0	Vulnerable	Beckhoff

cpe:2.3:a:beckhoff:twincat:*:*:*:*:*:*:*:* Versions 3.0 to before 3.1 Vulnerable ·Beckhoff
cpe:2.3:a:beckhoff:twincat:2.0:*:*:*:*:*:*:* Versions 2.0 Vulnerable ·Beckhoff
cpe:2.3:a:beckhoff:twincat:3.1:build_4022:*:*:*:*:*:* Versions 3.1 build_4022 Vulnerable ·Beckhoff
cpe:2.3:a:beckhoff:twincat:3.1:build_4024.0:*:*:*:*:*:* Versions 3.1 build_4024.0 Vulnerable ·Beckhoff

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2019-16871
2026-10-03 Alias added: GHSA-2q68-c93j-vxw8

References

Exploit 1

https://www.ic4.be/2019/12/18/beckhoff-cve-2019-16871/#more-648

Advisory 1

https://download.beckhoff.com/download/document/product-security/Advisories/advisory-2017-001.pdf

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-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-2017-12294 Improper authorization in ICS-CERT Beckhoff TwinCAT CVSS 3.0CRITICAL 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