CVE-2020-12526
MEDIUMBeckhoff Automation GmbH & Co. KG <2.3.0.12, <3.1.0.1 - DoS
Title source: llmDescription
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.
References (2)
Core 2
Core References
Third Party Advisory x_refsource_confirm
https://cert.vde.com/en-us/advisories/vde-2020-051
Vendor Advisory x_refsource_confirm
https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2021-001.pdf
Scores
CVSS v3
5.3
EPSS
0.0095
EPSS Percentile
56.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Details
CWE
CWE-20
Status
published
Products (3)
beckhoff/ipc_diagnostics_ua_server
< 3.1.0.1
beckhoff/tf6100
< 3.3.18
beckhoff/twincat_opc_ua_server
< 2.3.0.12
Published
May 13, 2021
Tracked Since
Feb 18, 2026