# CVE-2026-18460: RTI Connext Professional off-by-one error in core libraries

Source: https://junglewise.ai/threats/cve-2026-18460-off-by-one-error-out-of-bounds-write-vulnerability-in-rti-connext  
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-2026-18460 · Severity: info · Published 2026-09-22

RTI Connext Professional is middleware that enables real-time data distribution and communication between networked applications. An off-by-one error in the core libraries allows attackers to write data out-of-bounds in memory, potentially causing application crashes, data corruption, or arbitrary code execution depending on memory layout and exploit conditions.

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

## Quick answers

**Is CVE-2026-18460 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-18460 being exploited in the wild.

**How severe is CVE-2026-18460?** Informational severity, published 22 September 2026.

**Which products and versions are affected?** Rti Connext Professional 7.0.0 before 7.3.1.6, 7.4.0 before 7.7.0.1.

**Is there a fix for CVE-2026-18460?** 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-2026-18460 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-18460?** 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 off-by-one error in RTI Connext Professional's core libraries permits out-of-bounds write operations, leading to buffer overflow. The vulnerability affects versions 7.0.0 before 7.3.1.6 and 7.4.0 before 7.7.0.1. Exploitation requires network access to a Connext endpoint but no authentication; patched versions are available.

## Affected products

- RTI Connext Professional 7.0.0 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)