What is CVE-2021-38439?

CVE-2021-38439 is a high-severity vulnerability in Gurum Gurumdds, classified under Heap-based Buffer Overflow. CVSS score: 8.6/10. Published 2022-05-05.

How severe is CVE-2021-38439?

High severity. CVSS v3 base score is 8.6 out of 10.

Buffer overflow in Gurum Gurumdds

CVE-2021-38439

All versions of GurumDDS are vulnerable to heap-based buffer overflow, which may cause a denial-of-service condition or remotely execute arbitrary code.

Vulnerability class: Buffer Overflow

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

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H.

EPSS exploit prediction

EPSS: 0.028 (85.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.026 · newest: 0.028 · change: +0.002

Affected products

Gurum Gurumdds
Gurumnetworks Gurumdds — versions all versions

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

www.cisa.gov/uscert/ics/advisories/icsa-21-315-02 (US Government Resource, Third Party Advisory)

Frequently asked questions

What is CVE-2021-38439?: CVE-2021-38439 is a high-severity vulnerability in Gurum Gurumdds, classified under Heap-based Buffer Overflow. CVSS score: 8.6/10. Published 2022-05-05.
How severe is CVE-2021-38439?: High severity. CVSS v3 base score is 8.6 out of 10.