CVE-2025-71409: No Authentication for Very High Frequency Data Link messages used in CPDLC

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-07 · updated 2026-09-29
Weakness: CWE-306

Description

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.

Affected products

ATN-B1 CPDLC: all versions

References

https://www.cisa.gov/news-events/ics-advisories/icsa-26-219-01

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