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CVE-2026-18459

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

HIGH
8.7
CVSS Score
Published: September 22, 2026 at 05:50 PM UTC
Updated: September 22, 2026 at 07:51 PM UTC
1 product affected across 1 vendorConnext Professional

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Severity
HIGH8.7
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Connext Professional· Rti
95%
4.1x ≤ v < 5.1.*5.2.0 ≤ v < 5.2.*5.3.0 ≤ v < 5.3.*6.0.0 ≤ v < 6.0.*6.1.0 ≤ v < 6.1.*7.0.0 ≤ v < 7.3.1.67.4.0 ≤ v < 7.7.0.14.1x5.2.05.3.06.0.06.1.07.0.07.4.0
Affected range stops below 5.1.*, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.2.*, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.3.*, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.0.*, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.1.*, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.3.1.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.7.0.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://www.rti.com/vulnerabilities/#cve-2026-18459

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHRTI
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-682

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