CVE-2026-7866 Stack-based Buffer Overflow vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Buffers.
A stack-based buffer overflow in RTI Connext Professional Core Libraries allows attackers to execute arbitrary code or cause denial of service.
- 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-2026-7866?
CVE-2026-7866 is a critical memory corruption 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
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.*.
Weakness: CWE-121
Which versions are affected by CVE-2026-7866?
How do I fix CVE-2026-7866?
No fix has been published for CVE-2026-7866 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-2026-7866 being exploited?
There is no known exploitation of CVE-2026-7866 in the wild and no public exploit code.
Sources
Also known as GHSA-p66g-pww9-j5hr.