# CVE-2026-3894: RTI Connext Professional out-of-bounds read in Core Libraries

Source: https://junglewise.ai/threats/cve-2026-3894-rti-connext-professional-out-of-bounds-read-in-core-libraries  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-17. Updated: 2026-06-20  
License: CC BY 4.0 with a link back

CVE-2026-3894 · Severity: info · CVSS 9.2 · Published 2026-06-17

RTI Connext Professional is a connectivity framework used for real-time data exchange in critical industrial and defense systems. A vulnerability in its core libraries could allow an attacker to cause system crashes or potentially access sensitive information by sending specially crafted data. This could lead to service outages or operational disruptions in environments relying on this communication middleware.

Vendors: [Rti](https://junglewise.ai/threats/vendors/rti).

## Quick answers

**Is CVE-2026-3894 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-3894 being exploited in the wild.

**How severe is CVE-2026-3894?** Informational severity, with a CVSS score of 9.2, published 17 June 2026.

**Which products and versions are affected?** Rti Connext Professional (Core Libraries) 7.4.0 before 7.7.0, 7.0.0 before 7.3.1.3, 6.1.0 before 6.1.*, 6.0.0 before 6.0.*, 5.3.0 before 5.3.*, 5.0.0 before 5.2.*.

**Is there a fix for CVE-2026-3894?** 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-2026-3894 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-3894?** Check whether you run Rti Connext Professional (Core Libraries) 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 vulnerability (CWE-125) exists in the Core Libraries of RTI Connext Professional. The flaw is triggered when the software processes malformed input that causes it to read beyond the end of the intended buffer. An unauthenticated attacker can exploit this over the network without user interaction. Successful exploitation can result in a denial-of-service (system crash) or the leakage of sensitive data from memory. The vulnerability affects multiple versions across the 5.x, 6.x, and 7.x release branches; users should update to the respective patched versions (e.g., 7.7.0 or 7.3.1.3) as specified in the advisory.

## Affected products

- RTI Connext Professional (Core Libraries) 7.4.0 before 7.7.0, 7.0.0 before 7.3.1.3, 6.1.0 before 6.1.*, 6.0.0 before 6.0.*, 5.3.0 before 5.3.*, 5.0.0 before 5.2.*

## Timeline

- 2026-06-17: disclosed
- 2026-06-17: advisory

## References

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

## Related threats

- [RTI Connext Professional heap overflow in Core Libraries](https://junglewise.ai/threats/cve-2026-2467-rti-connext-professional-heap-overflow-in-core-libraries)