CVE-2025-1727 End-of-Train and Head-of-Train Remote Linking Protocol Weak Authentication
Attackers can bypass weak authentication in railway brake protocols using SDR to issue unauthorized brake commands, causing operational disruption.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-1727?
CVE-2025-1727 is a high-severity authentication bypass vulnerability in End-of-Train and Head-of-Train remote linking protocol, published on 10 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-1390
Which versions are affected by CVE-2025-1727?
How do I fix CVE-2025-1727?
No fix has been published for CVE-2025-1727 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-1727 being exploited?
There is no known exploitation of CVE-2025-1727 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-q5w3-wqpr-96vw.