Home/CVE/Improper Restriction of XML External Entity Reference vulnerability in RTI Connext Professional (Routing Service,Observa
CVE

CVE-2026-4374

Improper Restriction of XML External Entity Reference vulnerability in RTI Connext Professional (Routing Service,Observa

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

CRITICAL · CVSS 9.1 EPSS 0.0004
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-611Improper Restriction of XML External Entity Reference
▤

Affected Products & Versions

5
rti connext professional>= 5.3.0 and <= 5.3.1.45
rti connext professional>= 6.0.0 and <= 6.0.1.40
rti connext professional>= 6.1.0 and <= 6.1.2.27
rti connext professional>= 7.0.0 and < 7.3.1.1
rti connext professional>= 7.4.0 and < 7.7.0
▣

Scoring & Timeline

9.1
CRITICAL · CVSS v3.1 · 3f572a00-62e2-4423-959a-7ea25eff1638
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD01 Apr 2026 · 02:16 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.rti.com/vulnerabilities/#cve-2026-4374Vendor Advisory
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