CVE-2025-71410 ATN-B1 CVE debrief

Who should care

Defenders in aviation and air traffic control systems should assess exposure to this vulnerability, particularly those managing radio frequency communication systems and CPDLC functions.

Why it matters

CVE-2025-71410 is a medium-severity vulnerability in CPDLC systems used in aviation. Unnumbered Disconnect and malformed frames can terminate sessions, leading to loss of function and increased workload for controllers. Defenders in aviation and air traffic control should verify exposure and assess the need for updates or compensating controls.

• Potential loss of CPDLC functions requiring reversion to voice communication
• Increased controller workload due to session termination
• Need for verification of exposure in radio frequency communication systems
• Potential for disruption of air traffic control operations

Technical summary

CVE-2025-71410 involves Unnumbered Disconnect and malformed Aviation Very High Frequency Link Control frames that can terminate CPDLC sessions, requiring a reversion to voice communication and increasing controller workload. This type of attack can be carried out remotely over radio frequency. The vulnerability affects aviation and air traffic control systems, particularly those managing radio frequency communication systems and CPDLC functions. Defenders should prioritize verifying exposure in radio frequency communication systems and assessing the need for updates or compensating controls.

Defensive priority

Defenders should prioritize verifying exposure in radio frequency communication systems and assessing the need for updates or compensating controls.

Recommended defensive actions

• Verify exposure in radio frequency communication systems
• Assess the need for updates or compensating controls
• Monitor CPDLC sessions for unusual termination
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

Evidence from official sources indicates that Unnumbered Disconnect and malformed Aviation Very High Frequency Link Control frames can terminate CPDLC sessions. However, details on affected versions and specific remediation steps are limited.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.