CVE-2026-4374

EUVD-2026-17765

01.04.2026, 02:16

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>

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	9.1 CRITICAL	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 14%

Affected Products (NVD)

Vendor	Product	Version
rti	connext_professional	5.3.0 ≤ 𝑥 ≤ 5.3.1.45
rti	connext_professional	6.0.0 ≤ 𝑥 ≤ 6.0.1.40
rti	connext_professional	6.1.0 ≤ 𝑥 ≤ 6.1.2.27
rti	connext_professional	7.0.0 ≤ 𝑥 < 7.3.1.1
rti	connext_professional	7.4.0 ≤ 𝑥 < 7.7.0

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-611 - Improper Restriction of XML External Entity Reference
The software processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.

References

https://www.rti.com/vulnerabilities/#cve-2026-4374