CVE-2021-38487

Name: CVE-2021-38487
Creator: NVD / NIST
Published: 2022-05-05T17:15:09.857+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 3.17%

Last modified Jun 17, 2026

CVE-2021-38487 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 3.17% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.1/10

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

CVSS 4.0

8.8/10

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

EPSS Probability

3.17%

86.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Rti	Connext Dds Micro	>= 2.4
Rti	Connext Professional	>= 4.2, < 6.1.0
Rti	Connext Secure	>= 4.2, < 6.1.0

References

https://support.rti.com/s/login/?ec=302&startURL=%2Fs%2FPermissions Required, Vendor Advisory
https://www.cisa.gov/uscert/ics/advisories/icsa-21-315-02Third Party Advisory, US Government Resource
https://www.rti.com/vulnerabilities/#cve-2021-38487
https://support.rti.com/s/login/?ec=302&startURL=%2Fs%2FPermissions Required, Vendor Advisory
https://www.cisa.gov/uscert/ics/advisories/icsa-21-315-02Third Party Advisory, US Government Resource

Timeline

Published: May 5, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-38487?

How severe is CVE-2021-38487?

CVE-2021-38487 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 3.17% probability of exploitation in the next 30 days.

How do I fix CVE-2021-38487?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-38487?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST