CVE-2025-71410

MEDIUM 5.3

Malicious Link Control Frames Can Cause Loss of CPDLC Functions

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

Unnumbered Disconnect (U DISC) and malformed Aviation Very High Frequency Link Control frames can terminate sessions and lead to a loss of CPDLC functions requiring a reversion to voice communication and increased controller workload. This type of attack can be carried out remotely over radio frequency.

CWE	CWE-770
Vendor	atn-b1
Product	cpdlc
Published	Aug 7, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

ATN-B1 / CPDLC

All versions

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Martin Strohmeier of Armasuisse reported this vulnerability to CISA.