What is CVE-2025-71411?

CVE-2025-71411 is a medium-severity vulnerability in Atn-B1 Cpdlc, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2026-08-07.

How severe is CVE-2025-71411?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Resource exhaustion in Atn-B1 Cpdlc

CVE-2025-71411

Broadcast control frames can disconnect multiple aircraft simultaneously leading to delayed clearances and air traffic controller overload. This type of attack can be carried out remotely over radio frequency.

Published 2026-08-07 · last modified 2026-09-29.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (25.9th percentile), scored 2026-11-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 25.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Atn-B1 Cpdlc — versions All versions

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

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

Frequently asked questions

What is CVE-2025-71411?: CVE-2025-71411 is a medium-severity vulnerability in Atn-B1 Cpdlc, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2026-08-07.
How severe is CVE-2025-71411?: Medium severity. CVSS v3 base score is 5.3 out of 10.