CPDLC over ATN-B1 Vulnerabilities — ICSA-26-219-01

Summary

View CSAF Summary ATN-B1 CPDLC relies on legacy clear text unauthenticated radio frequency links. Research demonstrates that these characteristics allow unauthorized message injection, denial-of-service conditions, and forced session resets. These vulnerabilities do not constitute an unsafe aircraft condition but can degrade operational safety margins by increasing workload, delaying safety-critical instructions,…

Timeline

Published by source

2026-08-07

Risk context

• Reported severity or threat level: medium.
• Review exposure for the affected product or family: ICS Advisory.

Product

ICS Advisory

What to do

General, cautious steps (verify details in the official source):

• Review exposure and plan remediation based on risk and environment.
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Evidence and provenance

Canonical advisory ID

ICSA-26-219-01

Source

CISA ICS

Vendor

CISA

Published by source

2026-08-07

Last source activity

2026-08-07

Additional identifiers

CVE-2025-71409

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.