What is CVE-2026-30803?

CVE-2026-30803 is a critical-severity vulnerability in Rti Connext Micro, classified under Integer Underflow. CVSS score: 9.1/10. Published 2026-06-17.

How severe is CVE-2026-30803?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Integer overflow in Rti Connext Micro

CVE-2026-30803

Integer Underflow (Wrap or Wraparound) vulnerability in RTI Connext Micro (Core Libraries) allows Overread Buffers.This issue affects Connext Micro: from 4.0.0 before 4.3.0.

EPSS: 0.003 (21.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

Affected products

Rti Connext Micro — versions 4.0.0
Rti Connext_micro

Weakness classification (CWE)

CWE-191 — Integer Underflow

References

3f572a00-62e2-4423-959a-7ea25eff1638 (Vendor Advisory)

Frequently asked questions

What is CVE-2026-30803?: CVE-2026-30803 is a critical-severity vulnerability in Rti Connext Micro, classified under Integer Underflow. CVSS score: 9.1/10. Published 2026-06-17.
How severe is CVE-2026-30803?: Critical severity. CVSS v3 base score is 9.1 out of 10.