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TI-2026-03810 Aliases CVE-2026-4374GHSA-f5w8-q66w-xp9m

XML external entity injection in RTI Connext Professional

Priority LOW 38CWE-611Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Improper Restriction of XML External Entity Reference vulnerability in RTI Connext Professional (Recording Service,Routing Service,Queueing Service,Cloud Discovery Service,Observability Collector) allows Serialized Data External Linking, Data Serialization External Entities Blowup. This issue affects Connext Professional: from 7.4.0 before 7.7.0, from 7.0.0 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.*.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00239 15th percentileScored 2026-11-07
Fix Fixed Connext Professional (RTI): 7.7.0, 7.3.1.1, 6.1.2.34

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
RTIConnext Professional7.4.0 to before 7.7.0; 7.0.0 to before 7.3.1.1; 6.1.0 to before 6.1.2.34; 6.0.0 and later; 5.3.0 and later7.7.0, 7.3.1.1, 6.1.2.34Patch availableCNA
  • Connext Professional VendorRTI Affected 7.4.0 to before 7.7.0; 7.0.0 to before 7.3.1.1; 6.1.0 to before 6.1.2.34; 6.0.0 and later; 5.3.0 and later Fixed in 7.7.0, 7.3.1.1, 6.1.2.34 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*5.3.0 – 5.3.1.45; 6.0.0 – 6.0.1.40; 6.1.0 – 6.1.2.27; 7.0.0 to before 7.3.1.1; 7.4.0 to before 7.7.0VulnerableRTI
  • cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:* Versions 5.3.0 – 5.3.1.45; 6.0.0 – 6.0.1.40; 6.1.0 – 6.1.2.27; 7.0.0 to before 7.3.1.1; 7.4.0 to before 7.7.0 Vulnerable ·RTI

Remediation

  • Fix · CNA Connext Professional (RTI) Fixed in 7.7.0, 7.3.1.1, 6.1.2.34

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-4374
  2. 2026-10-03 Alias added: GHSA-f5w8-q66w-xp9m

References

Advisory 1

  • TI-2021-16087 Potential Network Amplification and Information Exposure in RTI Connext Professional and Connext Micro CVSS 4.0HIGH 8.8
  • TI-2026-03368 Out-of-bounds read in RTI Connext Professional CVSS 4.0CRITICAL 9.2
  • TI-2026-02096 Heap-based buffer overflow in RTI Connext Professional CVSS 4.0CRITICAL 9.2
  • TI-2024-34933 SQL injection in RTI Connext Professional CVSS 4.0CRITICAL 9.1
  • TI-2021-16038 RTI Connext DDS Professional and Connext DDS Secure Incorrect Calculation of Buffer Size CVSS 3.1CRITICAL 9.8
  • TI-2026-06407 Buffer overflow in RTI Connext Professional CVSS 4.0HIGH 8.8
See all 31 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences