9.8

CVE-2019-16871: beckhoff twincat Authentication Bypass by Spoofing

CVSS: 9.8v3.1CriticalModified
Published 19-12-2019Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2019-16871 is a critical (CVSS 9.8) Authentication Bypass by Spoofing vulnerability in beckhoff twincat. EPSS estimates a 5.30% chance of exploitation in the next 30 days, higher than 92.5% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
5.30%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 19-12-2019
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

5.30%

Chance of exploitation in the next 30 days

Percentile

93%

Versus all other CVEs

30-day change

0.00 pp

From 5.30% on 21-09-2026

21-09-202621-10-2026
EPSS score
5.30%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (ic4.be)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Beckhoff1 product
  • twincat≥ 3.0, < 3.1 | 2.0 | 3.1:build_4022 | 3.1:build_4024.0

1 vendor · 1 product

References

2 links