# CVE-2026-11389: RTI Connext Professional out-of-bounds read in core libraries

Source: https://junglewise.ai/threats/cve-2026-11389-out-of-bounds-read-function-call-with-incorrect-number-of  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-22. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-11389 · Severity: info · Published 2026-09-22

RTI Connext Professional is a middleware platform for distributed real-time systems communication. This vulnerability allows an attacker to read beyond allocated buffer boundaries in the core libraries, potentially exposing sensitive data or causing system instability. The issue affects multiple versions and requires network access to trigger.

Technologies: [Rti Connext Professional](https://junglewise.ai/threats/technologies/connext-professional). Vendors: [Rti](https://junglewise.ai/threats/vendors/rti).

## Quick answers

**Is CVE-2026-11389 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-11389 being exploited in the wild.

**How severe is CVE-2026-11389?** Informational severity, published 22 September 2026.

**Which products and versions are affected?** Rti Connext Professional 7.3.0 before 7.3.1.6, 7.4.0 before 7.7.0.1.

**Is there a fix for CVE-2026-11389?** 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-2026-11389 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-11389?** 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

An out-of-bounds read combined with type confusion and incorrect function call arguments exists in RTI Connext Professional's core libraries. The vulnerability allows an attacker with network access to overread buffers, potentially disclosing sensitive information. Patches are available for affected versions 7.4.0–7.7.0.1 and 7.3.0–7.3.1.6.

## Affected products

- RTI Connext Professional 7.3.0 before 7.3.1.6, 7.4.0 before 7.7.0.1

## Timeline

- 2026-09-22: disclosed

## References

- [https://www.rti.com/vulnerabilities/](https://www.rti.com/vulnerabilities/)

## Related threats

- [RTI Connext Professional use-after-free in Security Plugins](https://junglewise.ai/threats/cve-2026-8849-use-after-free-vulnerability-in-rti-connext-professional-security)
- [RTI Connext Professional stack-based buffer overflow in core libraries](https://junglewise.ai/threats/cve-2026-7866-stack-based-buffer-overflow-vulnerability-in-rti-connext)
- [RTI Connext Professional out-of-bounds read in core libraries](https://junglewise.ai/threats/cve-2026-18626-out-of-bounds-read-vulnerability-in-rti-connext-professional-core)
- [RTI Connext Professional integer overflow in Core Libraries](https://junglewise.ai/threats/cve-2026-18462-integer-overflow-or-wraparound-improper-access-control)
- [RTI Connext Professional format string injection in Core Libraries](https://junglewise.ai/threats/cve-2026-18461-use-of-externally-controlled-format-string-vulnerability-in-rti)