CVE-2026-30803 | Integer Underflow (Wrap or Wraparound) vulnerability in RTI … | CVSS 8.8 HIGH

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.

Metadata

CVE ID: CVE-2026-30803
State: PUBLISHED
Assigner: RTI
Reserved: 2026-03-05 14:43 UTC
Published: 2026-06-17 17:21 UTC
Last updated: 2026-06-17 17:58 UTC
Primary CWE: CWE-191
CWE-191 Integer Underflow (Wrap or Wraparound)
Vendor / Product: RTI / Connext Micro
Sources: cve.org · NVD

Severity & Metrics

8.8 HIGH CVSS 4.0

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
RTI	Connext Micro	—	4.0.0 < 4.3.0

Weakness (CWE)

CWE	Source	Description
CWE-191	cna	CWE-191 Integer Underflow (Wrap or Wraparound)

CVSS scores (1)

Score	Severity	Version	Source	Vector
8.8	HIGH	4.0	cna	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

References (1)

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