CVE-2026-30803
Integer Underflow (Wrap or Wraparound) vulnerability in RTI Connext Micro (Core Libraries) allows Overread Buffers.
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.
INFO
Published Date :
June 17, 2026, 6:17 p.m.
Last Modified :
July 8, 2026, 2:05 p.m.
Remotely Exploit :
Yes !
Source :
3f572a00-62e2-4423-959a-7ea25eff1638
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | HIGH | 3f572a00-62e2-4423-959a-7ea25eff1638 | ||||
| CVSS 4.0 | HIGH | 3f572a00-62e2-4423-959a-7ea25eff1638 |
Solution
- Update RTI Connext Micro to version 4.3.0 or later.
- Apply vendor patches when available.
- Review secure coding practices for integer handling.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-30803.
| URL | Resource |
|---|---|
| https://www.rti.com/vulnerabilities/#cve-2026-30803 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-30803 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-30803
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-30803 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-30803 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 08, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:rti:connext_micro:*:*:*:*:*:*:*:* versions from (including) 4.0.0 up to (excluding) 4.3.0 Added Reference Type RTI: https://www.rti.com/vulnerabilities/#cve-2026-30803 Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-30803', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-17T17:58:11.377761Z'} -
New CVE Received by 3f572a00-62e2-4423-959a-7ea25eff1638
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'RTI', 'modules': ['Core Libraries'], 'product': 'Connext Micro', 'versions': [{'status': 'affected', 'version': '4.0.0', 'lessThan': '4.3.0', 'versionType': 'custom'}], 'packageURL': 'pkg:generic/connext_micro', 'packageName': 'connext_micro', 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V4.0 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 Added CWE CWE-191 Added Reference https://www.rti.com/vulnerabilities/#cve-2026-30803