Is CVE-2026-7866 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-7866 being exploited in the wild.

How severe is CVE-2026-7866?

Informational severity, published 22 September 2026.

Which products and versions are affected?

Rti Connext Professional 7.4.0 before 7.7.0.1, 7.0.0 before 7.3.1.6, 6.1.0 before 6.1.x, 6.0.0 before 6.0.x, 5.3.0 before 5.3.x, 5.2.0 before 5.2.x, 4.3x before 5.1.x.

Is there a fix for CVE-2026-7866?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

Am I affected by CVE-2026-7866?

Check whether you run Rti Connext Professional at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-7866: RTI Connext Professional stack-based buffer overflow in core libraries

CVE-2026-7866 · Severity: info · Published 2026-09-22

RTI Connext Professional is a middleware platform used for real-time data distribution in industrial and enterprise systems. A stack-based buffer overflow vulnerability in the core libraries could allow an attacker to crash systems or potentially execute arbitrary code, depending on how the product is deployed and accessed.

Technologies: Rti Connext Professional. Vendors: Rti.

Quick answers

Is CVE-2026-7866 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-7866 being exploited in the wild.
How severe is CVE-2026-7866?: Informational severity, published 22 September 2026.
Which products and versions are affected?: Rti Connext Professional 7.4.0 before 7.7.0.1, 7.0.0 before 7.3.1.6, 6.1.0 before 6.1.x, 6.0.0 before 6.0.x, 5.3.0 before 5.3.x, 5.2.0 before 5.2.x, 4.3x before 5.1.x.
Is there a fix for CVE-2026-7866?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-7866 attacked?: It is in a software library.
Am I affected by CVE-2026-7866?: Check whether you run Rti Connext Professional at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A stack-based buffer overflow exists in the core libraries of RTI Connext Professional across multiple versions. The vulnerability can be triggered through external input and affects the integrity and availability of systems using the affected product. The advisory does not provide specific attack vector or authentication requirements; patches are available for active LTS releases.

Affected products

RTI Connext Professional 7.4.0 before 7.7.0.1, 7.0.0 before 7.3.1.6, 6.1.0 before 6.1.x, 6.0.0 before 6.0.x, 5.3.0 before 5.3.x, 5.2.0 before 5.2.x, 4.3x before 5.1.x

Timeline

2026-09-22: disclosed

References

https://www.rti.com/vulnerabilities/

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