XXE in Rti Connext Professional

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) 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>

Vulnerability class: XXE (XML External Entity)

EPSS: 0.002 (14.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-4374?
CVE-2026-4374 is a critical-severity vulnerability in Rti Connext Professional, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.1/10. Published 2026-04-01.
How severe is CVE-2026-4374?
Critical severity. CVSS v3 base score is 9.1 out of 10.