CVE-2026-30803

Name: CVE-2026-30803
Creator: NVD / NIST
Published: 2026-06-17T18:17:43.41+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.28%

Last modified Jun 17, 2026

CVE-2026-30803 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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 estimates a 0.28% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 4.0

8.8/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.28%

19.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-191

References

https://www.rti.com/vulnerabilities/#cve-2026-30803

Timeline

Published: Jun 17, 2026
Last Modified: Jun 17, 2026
Status: Undergoing Analysis

Frequently Asked Questions

What is 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.

How severe is CVE-2026-30803?

CVE-2026-30803 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.28% probability of exploitation in the next 30 days.

How do I fix CVE-2026-30803?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-30803?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST