What is CVE-2025-71413?

CVE-2025-71413 is a medium-severity vulnerability in Atn-B1 Cpdlc, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 5.3/10. Published 2026-08-07.

How severe is CVE-2025-71413?

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

Vulnerability in Atn-B1 Cpdlc

CVE-2025-71413

Malformed or out-of-sequence frames at the Aviation Very High Frequency Link Control X.25 layers cause repeated resets which may result in increased workload and reduced situational awareness. 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-754 — Improper Check for Unusual or Exceptional Conditions

References

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

Frequently asked questions

What is CVE-2025-71413?: CVE-2025-71413 is a medium-severity vulnerability in Atn-B1 Cpdlc, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 5.3/10. Published 2026-08-07.
How severe is CVE-2025-71413?: Medium severity. CVSS v3 base score is 5.3 out of 10.