CVE-2026-18459 Incorrect Calculation vulnerability in RTI Connext Professional (Core Libraries) allows Abuse Existing Functionality.
An incorrect calculation flaw in RTI Connext Professional allows attackers to abuse existing functionality, requiring an upgrade to secure the system.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18459?
CVE-2026-18459 is a high-severity vulnerability in RTI Connext Professional, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Incorrect Calculation vulnerability in RTI Connext Professional (Core Libraries) allows Abuse Existing Functionality. 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 4.1x before 5.1.*.
Weakness: CWE-682
Which versions are affected by CVE-2026-18459?
How do I fix CVE-2026-18459?
No fix has been published for CVE-2026-18459 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-18459 being exploited?
There is no known exploitation of CVE-2026-18459 in the wild and no public exploit code.
Sources
Also known as GHSA-fp84-96jf-3hg5.