What is CVE-2019-16871?

CVE-2019-16871 is a critical-severity vulnerability in Beckhoff Twincat, classified under Authentication Bypass by Spoofing. CVSS score: 9.8/10. Published 2019-12-19.

How severe is CVE-2019-16871?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Beckhoff Twincat

CVE-2019-16871

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.

EPSS: 0.053 (91.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Beckhoff Twincat — versions 2.0, 3.1
N/a — versions n/a

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2019-16871?: CVE-2019-16871 is a critical-severity vulnerability in Beckhoff Twincat, classified under Authentication Bypass by Spoofing. CVSS score: 9.8/10. Published 2019-12-19.
How severe is CVE-2019-16871?: Critical severity. CVSS v3 base score is 9.8 out of 10.