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TI-2021-16030 Aliases CVE-2021-38427GHSA-xpjm-7phh-w9j8

RTI Connext DDS Professional and Connext DDS Secure Stack-based Buffer Overflow

Priority LOW 35CWE-121Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

RTI Connext DDS Professional and Connext DDS Secure Versions 4.2.x to 6.1.0 are vulnerable to a stack-based buffer overflow, which may allow a local attacker to execute arbitrary code.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00581 48th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

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 DDS Professional4.2x – 6.1.0—No fix listedCNA
RTIConnext DDS Secure4.2x – 6.1.0—No fix listedCNA
  • Connext DDS Professional VendorRTI Affected 4.2x – 6.1.0 Fixed in — No fix listed CNA
  • Connext DDS Secure VendorRTI Affected 4.2x – 6.1.0 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*4.2.0 – 6.1.0VulnerableRTI
cpe:2.3:a:rti:connext_secure:*:*:*:*:*:*:*:*4.2.0 – 6.1.0VulnerableRTI
  • cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:* Versions 4.2.0 – 6.1.0 Vulnerable ·RTI
  • cpe:2.3:a:rti:connext_secure:*:*:*:*:*:*:*:* Versions 4.2.0 – 6.1.0 Vulnerable ·RTI

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-38427
  2. 2026-10-03 Alias added: GHSA-xpjm-7phh-w9j8

References

Advisory 2

  • 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