Quick answers
- Is CVE-2026-18458 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-18458 being exploited in the wild.
- How severe is CVE-2026-18458?
- Informational severity, published 22 September 2026.
- Which products and versions are affected?
- Rti Connext Professional 7.4.0 before 7.7.0.1, 7.3.0 before 7.3.1.6, 6.1.2.21 and later before 6.1.x end of support.
- Is there a fix for CVE-2026-18458?
- 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-2026-18458?
- 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
The vulnerability involves an out-of-bounds read combined with type confusion in the Core Libraries, allowing an attacker to access memory using an incompatible type. The precise attack vector and preconditions are not detailed in available references, but the issue affects multiple version lines of Connext Professional and can result in buffer overreads that expose internal state or corrupt execution flow.
Affected products
- RTI Connext Professional 7.4.0 before 7.7.0.1, 7.3.0 before 7.3.1.6, 6.1.2.21 and later before 6.1.x end of support
Timeline
- 2026-09-22: disclosed