High severity8.6NVD Advisory· Published May 5, 2022· Updated Jun 17, 2026

CVE-2021-38447

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Oci/Openddsllm-fuzzy2 versions
<3.18.1+ 1 more
- (no CPE)range: <3.18.1
- (no CPE)range: unspecified

Patches

Vulnerability mechanics

References

www.cisa.gov/uscert/ics/advisories/icsa-21-315-02nvdThird Party AdvisoryUS Government Resource
opendds.orgnvdProduct

News mentions

No linked articles in our index yet.

Severity

HighCVSS v3.1

8.6/ 10

Attack vector: Network
Complexity: Low
Privileges: None
User interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: Low
Availability: High

Vector

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

EPSS

Probability of exploitation in the next 30 days.

2.05%

VYPR risk score

Composite of severity, exploitation, and reach.

0.56high

cvss	0.559
epss	0.002
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000

Weaknesses

CWE-405
Asymmetric Resource Consumption (Amplification)

CVE ID

CVE-2021-38447

Credits

FM
Federico Maggi (Trend Micro Research), Ta-Lun Yen, and Chizuru Toyama (TXOne Networks, Trend Micro) reported these vulnerabilities to CISA. In addition, Patrick Kuo, Mars Cheng (TXOne Networks, Trend Micro), Víctor Mayoral-Vilches (Alias Robotics), and Erik Boasson (ADLINK Technology) also contributed to this research.
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