---
id: CVE-2026-18461
title: >-
  Use of Externally-Controlled Format String vulnerability in RTI Connext
  Professional (Core Libraries) allows Format String Injection
summary: >-
  Use of Externally-Controlled Format String vulnerability in RTI Connext
  Professional (Core Libraries) allows Format String Injection. This issue
  affects Connext Professional: from 7.5.0 before 7.7.0.1, from 7.3.0.10 before
  7.3.1.6.
severity: critical
cvss: 9.2
cvssVector: 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-134
vendor: RTI
product: connext_professional
affected:
  - connext_professional >= 7.5.0 < 7.7.0.1
  - connext_professional >= 7.3.0.10 < 7.3.1.6
published: '2026-09-22'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T19:37:36.747'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-18461'
references:
  - url: 'https://www.rti.com/vulnerabilities/#cve-2026-18461'
    label: 3f572a00-62e2-4423-959a-7ea25eff1638
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-22T18:46:47.445803Z'
cvssSource: cna
ingestedAt: '2026-09-22T18:08:12.481Z'
epss: 0.00331
epssPercentile: 0.26481
---

## Overview

Use of Externally-Controlled Format String vulnerability in RTI Connext Professional (Core Libraries) allows Format String Injection. This issue affects Connext Professional: from 7.5.0 before 7.7.0.1, from 7.3.0.10 before 7.3.1.6.

## Remediation

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