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    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>

    Published:Apr 1, 2026
    Last Modified:Jun 17, 2026
    EPS:Apr 1, 2026
    EPSS Score:0.00235
    CVSS Score:9.1

    Affected Products

    Vendor
    Rti
    Product
    Connext Professional

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-221 Data Serialization External Entities Blowup

    Related CVEs

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    CVE-2026-3894 (CVSS 9.2) — Out-of-bounds Read vulnerability in RTI Connext Professional (Core Libraries) allows Overread Buffers.This iss…
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    CVE-2026-2467 (CVSS 9.2) — Heap-based Buffer Overflow vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Variable…
    CVE-2025-14543 (CVSS 8.8) — Improper Restriction of XML External Entity Reference vulnerability in RTI Connext Professional (Core Librarie…
    CVE-2026-2394 (CVSS 6.3) — Buffer Over-read vulnerability in RTI Connext Professional (Core Libraries) allows Overread Buffers.This issue…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High