What is CVE-2021-38443?

CVE-2021-38443 is a medium-severity vulnerability in Eclipse Cyclonedds, classified under CWE-228. CVSS score: 6.6/10. Published 2022-05-05.

How severe is CVE-2021-38443?

Medium severity. CVSS v3 base score is 6.6 out of 10.

Vulnerability in Eclipse Cyclonedds

CVE-2021-38443

Eclipse CycloneDDS versions prior to 0.8.0 improperly handle invalid structures, which may allow an attacker to write arbitrary values in the XML parser.

Published 2022-05-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H.

EPSS exploit prediction

EPSS: 0.021 (81.8th percentile), scored 2026-10-22.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 81.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.022 · newest: 0.021 · change: -0.000

Affected products

Eclipse Cyclonedds — versions unspecified

Weakness classification (CWE)

CWE-228

References

www.cisa.gov/uscert/ics/advisories/icsa-21-315-02 (US Government Resource, Third Party Advisory)
projects.eclipse.org/projects/iot.cyclonedds (Product)

Frequently asked questions

What is CVE-2021-38443?: CVE-2021-38443 is a medium-severity vulnerability in Eclipse Cyclonedds, classified under CWE-228. CVSS score: 6.6/10. Published 2022-05-05.
How severe is CVE-2021-38443?: Medium severity. CVSS v3 base score is 6.6 out of 10.