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CRITICAL · 9.1

CVE-2026-4374

Improper Restriction of XML External Entity Reference vulnerability in RTI Connext Professional (Cloud Discovery Service, Recording Service, Routing Service, Queueing Service, Observability Collector)...

Vulnerability Description

Improper Restriction of XML External Entity Reference vulnerability in RTI Connext Professional (Cloud Discovery Service, Recording Service, Routing Service, Queueing Service, Observability Collector) allows Serialized Data External Linking, Data Serialization External Entities Blowup.<p>This issue affects Connext Professional: from 7.4.0 before 7.7.0, from 7.1.0 before 7.3.1.1, from 6.1.0 before 6.1.2.34, from 6.0.0 before 6.0.*, from 5.3.0 before 5.3.*.</p>

CVSS Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
RtiConnext Professional>= 5.3.0, <= 5.3.1.45

Related Weaknesses (CWE)

CWE-611

References

FAQ

What is CVE-2026-4374?

CVE-2026-4374 is a vulnerability with a CVSS score of 9.1 (CRITICAL). Improper Restriction of XML External Entity Reference vulnerability in RTI Connext Professional (Cloud Discovery Service, Recording Service, Routing Service, Queueing Service, Observability Collector)...

How severe is CVE-2026-4374?

CVE-2026-4374 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-4374?

Check the references section above for vendor advisories and patch information. Affected products include: Rti Connext Professional.