CVE-2026-7866

Stack-based Buffer Overflow vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Buffers.

Published Sep 22, 2026 CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed

Description

Stack-based Buffer Overflow vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Buffers. This issue affects Connext Professional: from 7.4.0 before 7.7.0.1, from 7.0.0 before 7.3.1.6, from 6.1.0 before 6.1.*, from 6.0.0 before 6.0.*, from 5.3.0 before 5.3.*, from 5.2.0 before 5.2.*, from 4.3x before 5.1.*.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

RTI

Connext Professional

unaffected

Version	Status	Constraints
`7.4.0`	affected	< 7.7.0.1
`7.0.0`	affected	< 7.3.1.6
`6.1.0`	affected	< 6.1.*
`6.0.0`	affected	< 6.0.*
`5.3.0`	affected	< 5.3.*
`5.2.0`	affected	< 5.2.*
`4.3x`	affected	< 5.1.*

No data.

Vendor Product Versions

Rti

Connext Professional

Version	Status	Scheme	Platform
`[7.4.0,7.7.0.1)`	affected	generic	—
`[7.0.0,7.3.1.6)`	affected	generic	—
`[6.1.0,6.2.0)`	affected	generic	—
`[6.0.0,6.1.0)`	affected	generic	—
`[5.3.0,5.4.0)`	affected	generic	—
`[5.2.0,5.3.0)`	affected	generic	—
`[4.3x,5.2.0)`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact High

Subsequent System Availability Impact High

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.311% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact total

References

Link	Providers
https://www.rti.com/vulnerabilities/#cve-2026-7866

History

Sep 22, 2026 8:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`	ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Sep 22, 2026 7:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Sep 22, 2026 6:00 PM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		Stack-based Buffer Overflow vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Buffers. This issue affects Connext Professional: from 7.4.0 before 7.7.0.1, from 7.0.0 before 7.3.1.6, from 6.1.0 before 6.1., from 6.0.0 before 6.0., from 5.3.0 before 5.3., from 5.2.0 before 5.2., from 4.3x before 5.1.*.
Title		Stack-based Buffer Overflow vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Buffers.
First Time appeared		Rti Rti connext Professional
Weaknesses		CWE-121
CPEs		cpe:2.3:a:rti:connext_professional::::::::
Vendors & Products		Rti Rti connext Professional
References		https://www.rti.com/vulnerabilities/#cve-2026-7866
Metrics		cvssV4_0 `{'score': 9.3, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}`