---
id: CVE-2025-71410
title: >-
  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
summary: >-
  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. Th…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-770
published: '2026-08-07'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T19:30:43.093'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-71410'
references:
  - url: 'https://www.cisa.gov/news-events/ics-advisories/icsa-26-219-01'
    label: ics-cert@hq.dhs.gov
tags:
  - nvd
epss: 0.00327
epssPercentile: 0.23093
ingestedAt: '2026-09-08T20:10:03.156Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.