CVE-2021-38435— RTI Connext DDS Professional and Connext DDS Secure Incorrect Calculation of Buffer Size
Quick assessment
Affected
RTI Connext DDS Professional
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Real-Time Innovations Connext Dds Professional和Connext Dds Secure都是美国Real-Time Innovations公司的产品。Connext Dds Professional是一个旨在满足自主系统苛刻连接要求的软件框架。Connext Dds Secure是一个可信软件连接框架。用于构建和保护系统系统。 Real-Time Innovations Connext Dds Professional和Connext Dds Secure 存在缓
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-38435
Vulnerability Information
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Vulnerability Title
RTI Connext DDS Professional and Connext DDS Secure Incorrect Calculation of Buffer Size
Source: CVE Program / CVE List V5
Vulnerability Description
RTI Connext DDS Professional and Connext DDS Secure Versions 4.2x to 6.1.0 not correctly calculate the size when allocating the buffer, which may result in a buffer overflow.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区大小计算不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Connext Dds 多款产品缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Real-Time Innovations Connext Dds Professional和Connext Dds Secure都是美国Real-Time Innovations公司的产品。Connext Dds Professional是一个旨在满足自主系统苛刻连接要求的软件框架。Connext Dds Secure是一个可信软件连接框架。用于构建和保护系统系统。 Real-Time Innovations Connext Dds Professional和Connext Dds Secure 存在缓
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| RTI | Connext DDS Professional | 4.2x ~ 6.1.0 | - |
|
| RTI | Connext DDS Secure | 4.2x ~ 6.1.0 | - |
|
II. Public POCs for CVE-2021-38435
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2021-38435 (1)
-
https://www.cisa.gov/uscert/ics/advisories/icsa-21-315-02 x_refsource_CONFIRM
Other References for CVE-2021-38435 (1)
-
https://support.rti.com/s/login/?ec=302&startURL=%2Fs%2F x_refsource_CONFIRM
Same Patch Batch · RTI · 2022-05-05 · 4 CVEs total
| CVE-2021-38487 | 8.2 HIGH | Potential Network Amplification and Information Exposure in RTI Connext Professional and C |
| CVE-2021-38427 | 6.6 MEDIUM | RTI Connext DDS Professional and Connext DDS Secure Stack-based Buffer Overflow |
| CVE-2021-38433 | 6.6 MEDIUM | RTI Connext DDS Professional and Connext DDS Secure Stack-based Buffer Overflow |
IV. Related Vulnerabilities
Same vendor: RTI
-
CVE-2026-18626
Out-of-bounds Read vulnerability in RTI Connext Professional -
CVE-2026-18462
Integer Overflow or Wraparound, Improper Access Control vuln -
CVE-2026-18461
Use of Externally-Controlled Format String vulnerability in -
CVE-2026-18459
Incorrect Calculation vulnerability in RTI Connext Professio -
CVE-2026-18460
Off-by-one Error, Out-of-bounds Write vulnerability in RTI C
Same weakness: CWE-131
V. Comments for CVE-2021-38435
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