# CVE-2026-18462: RTI Connext Professional integer overflow in Core Libraries

Source: https://junglewise.ai/threats/cve-2026-18462-integer-overflow-or-wraparound-improper-access-control  
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-2026-18462 · Severity: info · Published 2026-09-22

RTI Connext Professional is middleware that enables real-time distributed communication for industrial and embedded systems. An integer overflow vulnerability in the Core Libraries allows attackers with local or network access to manipulate shared resources, potentially compromising system integrity or availability. The vulnerability affects multiple versions and requires a patch to remediate.

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

## Quick answers

**Is CVE-2026-18462 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-18462 being exploited in the wild.

**How severe is CVE-2026-18462?** 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.* (endpoint version unspecified).

**Is there a fix for CVE-2026-18462?** 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-2026-18462 attacked?** It is attacked over the network or with local access.

**Am I affected by CVE-2026-18462?** 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 integer overflow or wraparound flaw combined with improper access control in RTI Connext Professional's Core Libraries permits shared resource manipulation. The vulnerability is reachable over the network or via local access and does not require authentication. Patches are available for affected versions: 7.7.0.1+ (7.4.x branch), 7.3.1.6+ (7.0.x branch), and 6.1.x fixed versions.

## 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.* (endpoint version unspecified)

## 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 format string injection in Core Libraries](https://junglewise.ai/threats/cve-2026-18461-use-of-externally-controlled-format-string-vulnerability-in-rti)
- [RTI Connext Professional off-by-one error in core libraries](https://junglewise.ai/threats/cve-2026-18460-off-by-one-error-out-of-bounds-write-vulnerability-in-rti-connext)