CVE-2026-18626 Out-of-bounds Read vulnerability in RTI Connext Professional (Core Libraries) allows Overread Buffers.
An out-of-bounds read in RTI Connext Professional Core Libraries allows attackers to read memory or cause denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18626?
CVE-2026-18626 is a medium-severity memory corruption vulnerability in RTI Connext Professional, published on 22 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Out-of-bounds Read vulnerability in RTI Connext Professional (Core Libraries) allows Overread 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 5.0.0 before 5.1.*.
Weakness: CWE-125
Which versions are affected by CVE-2026-18626?
How do I fix CVE-2026-18626?
No fix has been published for CVE-2026-18626 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-18626 being exploited?
There is no known exploitation of CVE-2026-18626 in the wild and no public exploit code.
Sources
Also known as GHSA-366x-7vgf-6pg3.