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7.1

Very High Frequency Data Link lacks authentication for CPDLC messages

CVE-2025-71409 · published 2 months ago
Summary

An issue with Very High Frequency Data Link allows hackers to send fake messages to pilots, potentially causing confusion or incorrect instructions. This could lead to safety risks for pilots and passengers. Air traffic control and pilots should ensure they are using secure and up-to-date systems to prevent such attacks.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
atn-b1 cpdlc All versions
Original advisory text
Lack of authentication for Very High Frequency Data Link messages allows rogue ground stations to inject CPDLC messages leading to unexpected or misleading clearances and potential pilot confusion....
Lack of authentication for Very High Frequency Data Link messages allows rogue ground stations to inject CPDLC messages leading to unexpected or misleading clearances and potential pilot confusion. This type of attack can be carried out remotely over radio frequency.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
7.1 High
Exploitation
<1% chance of attack within 30 days
Type
CWE-306Missing Authentication for Critical Function
Timeline
Published7 Aug 2026
Updated4 Nov 2026
First seen7 Aug 2026
Sources
CVE-2025-71409 · NVD
CVE-2025-71409 · MITRE
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