CVE-2026-18459

Incorrect Calculation vulnerability in RTI Connext Professional (Core Libraries) allows Abuse Existing Functionality.

Published Sep 22, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Description

Incorrect Calculation vulnerability in RTI Connext Professional (Core Libraries) allows Abuse Existing Functionality. 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 4.1x 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.*
`4.1x`	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	semver	—
`[6.0.0,6.1.0)`	affected	semver	—
`[5.3.0,5.4.0)`	affected	semver	—
`[5.2.0,5.3.0)`	affected	semver	—
`[4.1x,5.2.0)`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.428% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact partial

References

Link	Providers
https://www.rti.com/vulnerabilities/#cve-2026-18459

History

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

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, '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		Incorrect Calculation vulnerability in RTI Connext Professional (Core Libraries) allows Abuse Existing Functionality. 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 4.1x before 5.1.*.
Title		Incorrect Calculation vulnerability in RTI Connext Professional (Core Libraries) allows Abuse Existing Functionality.
First Time appeared		Rti Rti connext Professional
Weaknesses		CWE-682
CPEs		cpe:2.3:a:rti:connext_professional::::::::
Vendors & Products		Rti Rti connext Professional
References		https://www.rti.com/vulnerabilities/#cve-2026-18459
Metrics		cvssV4_0 `{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}`