Beckhoff's TwinCAT RT network driver for Intel 8254x and 8255x is providing EtherCAT functionality. The driver implements real-time features. Except for Ethernet frames sent from real-time functionality, all other Ethernet frames sent through the driver are not padded if their payload is less than the minimum Ethernet frame size. Instead, arbitrary memory content is transmitted within in the padding bytes of the frame. Most likely this memory contains slices from previously transmitted or received frames. By this method, memory content is disclosed, however, an attacker can hardly control which memory content is affected. For example, the disclosure can be provoked with small sized ICMP echo requests sent to the device.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.3, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts limited data confidentiality, for affected systems. Impacting 20 products from beckhoff, from beckhoff, from intel and 17 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2020-06-16T14:15:10.977
2026-06-17T02:51:54.277
Modified
CVSSv3.1: 5.3 (MEDIUM)
AV:N/AC:L/Au:N/C:P/I:N/A:N
10.0
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | beckhoff | twincat_driver | ≤ 3.1.0.3603 | Yes |
| Application | beckhoff | twincat | 3.1 | No |
| Hardware | intel | 82540em | - | No |
| Hardware | intel | 82540ep | - | No |
| Hardware | intel | 82541ei | - | No |
| Hardware | intel | 82541er | - | No |
| Hardware | intel | 82541gi | - | No |
| Hardware | intel | 82541pi | - | No |
| Hardware | intel | 82544ei | - | No |
| Hardware | intel | 82544gc | - | No |
| Hardware | intel | 82545em | - | No |
| Hardware | intel | 82545gm | - | No |
| Hardware | intel | 82546eb | - | No |
| Hardware | intel | 82546gb | - | No |
| Hardware | intel | 82547ei | - | No |
| Hardware | intel | 82547gi | - | No |
| Application | beckhoff | twincat | ≤ 3.1.0.3512 | Yes |
| Application | beckhoff | twincat | 3.1 | No |
| Hardware | intel | 82540em | - | No |
| Hardware | intel | 82540ep | - | No |
| Hardware | intel | 82541ei | - | No |
| Hardware | intel | 82541er | - | No |
| Hardware | intel | 82541gi | - | No |
| Hardware | intel | 82541pi | - | No |
| Hardware | intel | 82544ei | - | No |
| Hardware | intel | 82544gc | - | No |
| Hardware | intel | 82545em | - | No |
| Hardware | intel | 82545gm | - | No |
| Hardware | intel | 82546eb | - | No |
| Hardware | intel | 82546gb | - | No |
| Hardware | intel | 82547ei_ | - | No |
| Hardware | intel | 82547gi | - | No |
| Application | beckhoff | twincat | ≤ 2.11.0.2120 | Yes |
| Application | beckhoff | twincat | 2.11 | No |
| Hardware | intel | 82540em | - | No |
| Hardware | intel | 82540ep | - | No |
| Hardware | intel | 82541ei | - | No |
| Hardware | intel | 82541er | - | No |
| Hardware | intel | 82541gi | - | No |
| Hardware | intel | 82541pi | - | No |
| Hardware | intel | 82544ei | - | No |
| Hardware | intel | 82544gc | - | No |
| Hardware | intel | 82545em | - | No |
| Hardware | intel | 82545gm | - | No |
| Hardware | intel | 82546eb | - | No |
| Hardware | intel | 82546gb | - | No |
| Hardware | intel | 82547ei_ | - | No |
| Hardware | intel | 82547gi | - | No |
| Application | beckhoff | twincat | ≤ 3.1.0.3600 | Yes |
| Application | beckhoff | twincat | 3.1 | No |
| Hardware | intel | 82557 | - | No |
| Hardware | intel | 82558 | - | No |
| Hardware | intel | 82559 | - | No |
| Application | beckhoff | twincat | ≤ 3.1.0.3500 | Yes |
| Application | beckhoff | twincat | 3.1 | No |
| Hardware | intel | 82557 | - | No |
| Hardware | intel | 82558 | - | No |
| Hardware | intel | 82559 | - | No |
| Application | beckhoff | twincat | ≤ 2.11.0.2117 | Yes |
| Application | beckhoff | twincat | 2.11 | No |
| Hardware | intel | 82557 | - | No |
| Hardware | intel | 82558 | - | No |
| Hardware | intel | 82559 | - | No |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For beckhoff's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.