# CVE-2021-38447

## Summary

- **CVE ID:** CVE-2021-38447
- **Severity:** HIGH
- **CVSS Score:** 8.6 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H)
- **CWE:** CWE-405
- **Published:** May 5, 2022
- **Last Modified:** Mar 13, 2026

## Description

OCI OpenDDS versions prior to 3.18.1 are vulnerable when an attacker sends a specially crafted packet to flood target devices with unwanted traffic, which may result in a denial-of-service condition.

## Affected Products

- OCI — OpenDDS (unspecified)

## References

- [CNA](https://www.cisa.gov/uscert/ics/advisories/icsa-21-315-02)
- [CNA](https://opendds.org/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.10%
- **EPSS Percentile:** 27.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._