7.5

CVE-2019-5636: beckhoff twincat Improper Resource Shutdown or Release

CVSS: 7.5v3.1HighModified
Published 21-11-2019Last modified 17-09-2024
Open JSON

Vulnerability summary

CVE-2019-5636 is a high (CVSS 7.5) Improper Resource Shutdown or Release vulnerability in beckhoff twincat. EPSS estimates a 1.43% chance of exploitation in the next 30 days, higher than 72.7% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
1.43%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 21-11-2019
    PublishedVulnerability first disclosed.
  2. 17-09-2024
    Last modifiedVulnerability information updated.

Description

When a Beckhoff TwinCAT Runtime receives a malformed UDP packet, the ADS Discovery Service shuts down. Note that the TwinCAT devices are still performing as normal. This issue affects TwinCAT 2 version 2304 (and prior) and TwinCAT 3.1 version 4204.0 (and prior).

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.43%

Chance of exploitation in the next 30 days

Percentile

73%

Versus all other CVEs

30-day change

0.00 pp

From 1.43% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.43%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (blog.rapid7.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Beckhoff3 products

1 vendor · 3 products

References

2 links