High severity8.2NVD Advisory· Published May 5, 2022· Updated Jun 17, 2026

CVE-2021-38487

Description

RTI Connext Professional versions 4.1 to 6.1.0, and Connext Micro versions 2.4 and later are vulnerable when an attacker sends a specially crafted packet to flood target devices with unwanted traffic. This may result in a denial-of-service condition and information exposure.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Rti/Connext Microllm-fuzzy2 versions
>=2.4+ 1 more
- (no CPE)range: >=2.4
- (no CPE)range: 4.0.0
Rti/Connext Professionalllm-fuzzy2 versions
4.1 - 6.1.0+ 1 more
- (no CPE)range: 4.1 - 6.1.0
- (no CPE)range: 4.1

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
www.rti.com/vulnerabilities/nvd

News mentions

No linked articles in our index yet.

Severity

HighCVSS v3.1

8.2/ 10

CVSS v48.8

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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

Vector

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

EPSS

Probability of exploitation in the next 30 days.

3.25%

VYPR risk score

Composite of severity, exploitation, and reach.

0.54high

cvss	0.533
epss	0.003
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000

Weaknesses

CWE-406
Insufficient Control of Network Message Volume (Network Amplification)
CWE-923
Improper Restriction of Communication Channel to Intended Endpoints

CVE ID

CVE-2021-38487

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), VÃctor Mayoral-Vilches (Alias Robotics), and Erik Boasson (ADLINK Technology) also contributed to this research.
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