Vulnerability · Published Sep 22, 2026 · Assigned by RTI
CVE-2026-18461Use of Externally-Controlled Format String vulnerability in RTI Connext Professional (Core Libraries) allows Format String Injection.
Critical 9.2
In plain English
A critical-severity security flaw in Connext Professional from RTI. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).
Severity (CVSS 4.0)9.2Critical
Exploit odds (30 days)0.3%top 73.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| RTI | Connext Professional | 7.5.0 – before 7.7.0.17.3.0.10 – before 7.3.1.6 |
Weakness: CWE-134 · Vector: 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