Beckhoff Embedded Windows PLCs through 3.1.4024.0, and Beckhoff Twincat on Windows Engineering stations, allow an attacker to achieve Remot…

published 2019-12-19 6y ago modified 2026-06-17 4mo ago also EUVD-2019-7378

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 5.3%; EPSS 5.3% chance of exploitation in 30 days, percentile 92%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

beckhoff twincat 3.1

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Exploit prediction

5.30% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

ic4.be https://www.ic4.be/2019/12/18/beckhoff-cve-2019-16871/#more-648 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	9.3	AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness

CWE-290 Authentication Bypass by Spoofing

References

ic4.be /2019/12/18/beckhoff-cve-2019-16871/#more-648
exploit, third-party-advisory
download.beckhoff.com /download/document/product-security/Advisories/advisory-2017-001.pdf
vendor-advisory

Sources

CVE List CVE-2019-16871
NVD CVE-2019-16871

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