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CVE-2020-12526

nvd nist
Published: May 13, 2021Modified: Jun 17, 2026

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5.3
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Exploitability: 3.9 / Impact: 1.4
Source: NVD

Description

TwinCAT OPC UA Server in versions up to 2.3.0.12 and IPC Diagnostics UA Server in versions up to 3.1.0.1 from Beckhoff Automation GmbH & Co. KG are vulnerable to denial of service attacks. The attacker needs to send several specifically crafted requests to the running OPC UA server. After some of these requests the OPC UA server is no longer responsive to any client. This is without effect to the real-time functionality of IPCs.

Affected (3)

Beckhoff
3 products
Ipc Diagnostics Ua Server
Tf6100
Twincat Opc Ua Server
Configuration A
3 vulnerable
Vulnerable SoftwareAffected Versions
Ipc Diagnostics Ua Server
Up to 3.1.0.1
Tf6100
Up to 3.3.18
Twincat Opc Ua Server
Up to 2.3.0.12

Related CWEs

CWE-20
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

References (4)

Source: info@cert.vde.com
Third Party Advisory
Source: info@cert.vde.com
Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory

Timeline

No history available yet.