Medium severity6.6NVD Advisory· Published May 5, 2022· Updated Jun 17, 2026

CVE-2021-38427

Description

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.

Affected products

Rti/Connext Professional3 versions
cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*range: >=4.2.0,<=6.1.0
- (no CPE)range: 4.2.x to 6.1.0
- (no CPE)range: 4.2x
Rti/Connext Secure
cpe:2.3:a:rti:connext_secure:*:*:*:*:*:*:*:*
Range: >=4.2.0,<=6.1.0
Rti/Connext DDS Securellm-fuzzy2 versions
4.2.x to 6.1.0+ 1 more
- (no CPE)range: 4.2.x to 6.1.0
- (no CPE)range: 4.2x

Patches

Vulnerability mechanics

References

support.rti.com/s/login/nvdPermissions RequiredVendor Advisory
www.cisa.gov/uscert/ics/advisories/icsa-21-315-02nvdThird Party AdvisoryUS Government Resource

News mentions

No linked articles in our index yet.

Severity

MediumCVSS v3.1

6.6/ 10

Attack vector: Local
Complexity: Low
Privileges: Low
User interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: Low
Availability: High

Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H

EPSS

Probability of exploitation in the next 30 days.

0.55%

VYPR risk score

Composite of severity, exploitation, and reach.

0.43medium

cvss	0.429
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000

Weaknesses

CWE-121
Stack-based Buffer Overflow
CWE-787
Out-of-bounds Write

CVE ID

CVE-2021-38427

Credits

FM
Federico Maggi (Trend Micro Research), Ta-Lun Yen, and Chizuru Toyama (TXOne Networks, Trend Micro) reported these vulnerabilities to CISA. In addition, Patrick Kuo, Mars Cheng (TXOne Networks, Trend Micro), Víctor Mayoral-Vilches (Alias Robotics), and Erik Boasson (ADLINK Technology) also contributed to this research.
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