---
id: CVE-2026-7866
title: >-
  Stack-based Buffer Overflow vulnerability in RTI Connext Professional (Core
  Libraries) allows Overflow Buffers
summary: >-
  Stack-based Buffer Overflow vulnerability in RTI Connext Professional (Core
  Libraries) allows Overflow Buffers. This issue affects Connext Professional:
  from 7.4.0 before 7.7.0.1, from 7.0.0 before 7.3.1.6, from 6.1.0 before 6.1.*,
  from …
severity: critical
cvss: 10
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'
cwe:
  - CWE-121
vendor: RTI
product: connext_professional
affected:
  - connext_professional >= 7.4.0 < 7.7.0.1
  - connext_professional >= 7.0.0 < 7.3.1.6
  - connext_professional >= 6.1.0 < 6.1.*
  - connext_professional >= 6.0.0 < 6.0.*
  - connext_professional >= 5.3.0 < 5.3.*
  - connext_professional >= 5.2.0 < 5.2.*
  - connext_professional >= 4.3x < 5.1.*
published: '2026-09-22'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T04:17:46.510'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-7866'
references:
  - url: 'https://www.rti.com/vulnerabilities/#cve-2026-7866'
    label: 3f572a00-62e2-4423-959a-7ea25eff1638
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-22T19:05:47.009185Z'
cvssSource: cna
ingestedAt: '2026-09-22T18:08:12.482Z'
epss: 0.00311
epssPercentile: 0.21312
---

## Overview

Stack-based Buffer Overflow vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Buffers. This issue affects Connext Professional: from 7.4.0 before 7.7.0.1, from 7.0.0 before 7.3.1.6, from 6.1.0 before 6.1.*, from 6.0.0 before 6.0.*, from 5.3.0 before 5.3.*, from 5.2.0 before 5.2.*, from 4.3x before 5.1.*.

## Remediation

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