ICSA-25-191-10: End-of-Train and Head-of-Train Remote Linking Protocol (Update C)
CISA advisory · released 2025-07-10
Source record Collected from CISA's CSAF advisory feed
- Distribution label in the document: TLP:WHITE
- Revision 4, 2025-09-18 (final)
CISA's summary
Risk evaluation: Successful exploitation of this vulnerability could allow an attacker to send their own brake control commands to the end-of-train device, causing a sudden stoppage of the train which may lead to a disruption of operations, or induce brake failure.
Products, as the advisory lists them
| Vendor | Product | Version |
|---|---|---|
| Association of American Railroads (AAR) | End-of-Train and Head-of-Train remote linking protocol | vers:all/* |
| Wabtec | TrainLink NG End of Train (NGEOT) | vers:all/* |
| Wabtec | TrainLink NG3 ATX End of Train (NG3 EOT) | vers:all/* |
| Wabtec | TrainLink NG4 ATX End of Train (NG4 EOT) | vers:all/* |
| Wabtec | TrainLink NG5 ATX End of Train (NG5 EOT) | vers:all/* |
| Siemens | Trainguard HOT | vers:all/* |
| Siemens | Trainguard EOT | vers:all/* |
| DPS Electronics | DPS 2020-He-LD | vers:all/* |
| DPS Electronics | DPS 2020-He | vers:all/* |
| DPS Electronics | DPS 3030-CM-MAG | vers:all/* |
| DPS Electronics | DPS 3030-I-MAG HTD | vers:all/* |
DeSpy has not checked any unit, hardware revision or firmware.
Vulnerabilities in this advisory
- CVE-2025-1727 · CWE-1390
The protocol used for remote linking over RF for End-of-Train and Head-of-Train (also known as a FRED) relies on a BCH checksum for packet creation. It is possible to create these EoT and HoT packets with a software defined radio and issue brake control commands to the EoT device, disrupting operations or potentially overwhelming the brake systems.
Acknowledgments, as the advisory lists them
- Neil Smith, Eric Reuter: reporting this vulnerability to CISA
The advisory's legal notice
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Sources
DeSpy's copy of this version is dated 2026-09-28.
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