CVE-2019-5636 | BDVDB-2026-126409 Detail

BeckhoffTwinCAT 2

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).

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact none, availability impact low. Attack vector: network.

Weaknesses#

CWE-404 Improper Resource Shutdown or Release

References#

Exploit#

No public exploit known

History#

Version 12019-11-21Record published in the CVE List.
Version 22024-09-17Most recent update recorded in the CVE List.

Published

Published: 2019-11-21
Last modified: 2024-09-17

Vendor information

Vendor: Beckhoff
Product: TwinCAT 2

All Beckhoff vulnerabilities

Score

5.3 Medium

EPSS

1.4%, Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 73.2.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 2304 and <= 2304
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

5.3 Medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	None
Integrity	None
Availability	Low

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).