CVE-2021-38443: Eclipse CycloneDDS Improper Handling of Syntactically Invalid Structure

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-05-05 · updated 2026-06-17
Weakness: CWE-228

Description

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.

Affected products

Eclipse CycloneDDS: before 0.8.0 — fixed in 0.8.0

How to fix

Upgrade to a fixed version: Eclipse CycloneDDS 0.8.0. Check the vendor advisory for mitigations.

References

https://projects.eclipse.org/projects/iot.cyclonedds
https://www.cisa.gov/uscert/ics/advisories/icsa-21-315-02
https://projects.eclipse.org/projects/iot.cyclonedds
https://www.cisa.gov/uscert/ics/advisories/icsa-21-315-02

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