CVE-2026-30803 RTI CVE debrief

Who should care

Users of RTI Connext Micro (Core Libraries) versions from 4.0.0 before 4.3.0 should review and apply patches or mitigations as recommended by the vendor. This includes operators, administrators, and security teams responsible for managing and securing systems that utilize RTI Connext Micro.

Technical summary

CVE-2026-30803 is an Integer Underflow (Wrap or Wraparound) vulnerability in RTI Connext Micro (Core Libraries). The vulnerability allows Overread Buffers and affects Connext Micro versions from 4.0.0 before 4.3.0. The CVSS score for this vulnerability is 8.8, indicating a HIGH severity. This vulnerability has the potential to impact the confidentiality, integrity, and availability of affected systems.

Defensive priority

High priority should be given to patching or mitigating this vulnerability due to its high CVSS score and potential impact on the confidentiality, integrity, and availability of affected systems.

Recommended defensive actions

• Inventory and assess usage of RTI Connext Micro (Core Libraries) versions from 4.0.0 before 4.3.0.
• Apply patches or mitigations recommended by RTI as soon as possible.
• Monitor for any compensating controls or workarounds that may be available.
• Review and update incident response plans to address potential exploitation.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further investigation and verification are necessary to fully understand the impact and scope of this vulnerability. The evidence is based on the official CVE record and NVD entry, which may have limitations in their current state of analysis.

Official resources