Vulnerability · Published Aug 7, 2026 · Assigned by icscert

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

High 7.1

In plain English

A high-severity missing authentication in CPDLC from ATN-B1. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).

Severity (CVSS 3.1)7.1High

Exploit odds (30 days)0.3%top 73.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
ATN-B1	CPDLC	All versions

Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:L

References

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