---
id: CVE-2026-82480
title: A security flaw has been discovered in NASA cFS up to 7.0.1
summary: >-
  A security flaw has been discovered in NASA cFS up to 7.0.1. The affected
  element is the function CFE_SB_GetUserDataLength of the file
  src/cFS/cfe/modules/sb/fsw/src/cfe_sb_util.c of the component cFE Software
  Bus. Performing a manipulat…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L'
cwe:
  - CWE-189
  - CWE-191
published: '2026-08-30'
updated: '2026-08-30'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-82480'
references:
  - url: 'https://vuldb.com/cve/CVE-2026-82480'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/888018'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/397030'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/397030/cti'
    label: cna@vuldb.com
tags:
  - nvd
epss: 0.00379
epssPercentile: 0.29128
ingestedAt: '2026-08-30T14:53:42.828Z'
---

## Overview

A security flaw has been discovered in NASA cFS up to 7.0.1. The affected element is the function CFE_SB_GetUserDataLength of the file src/cFS/cfe/modules/sb/fsw/src/cfe_sb_util.c of the component cFE Software Bus. Performing a manipulation of the argument TotalMsgSize/HdrSize results in integer underflow. It is possible to initiate the attack remotely. The vendor was contacted early about this disclosure but did not respond in any way.

## Remediation

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