What’s Vulnerable › Vulnerabilities

CVE-2021-38425: eProsima Fast DDS Network Amplification

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.0% 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-406

Description

eProsima Fast DDS versions prior to 2.4.0 (#2269) are susceptible to exploitation when an attacker sends a specially crafted packet to flood a target device with unwanted traffic, which may result in a denial-of-service condition and information exposure.

Affected products

• eProsima Fast-DDS: before 2.4.0 — fixed in 2.4.0

How to fix

Upgrade to a fixed version: eProsima Fast-DDS 2.4.0. Check the vendor advisory for mitigations.

References

• https://github.com/eProsima/Fast-DDS
• https://www.cisa.gov/uscert/ics/advisories/icsa-21-315-02
• https://github.com/eProsima/Fast-DDS
• https://www.cisa.gov/uscert/ics/advisories/icsa-21-315-02

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