What is CVE-2021-38423?

CVE-2021-38423 is a medium-severity vulnerability in Gurum Gurumdds, classified under Incorrect Calculation of Buffer Size. CVSS score: 6.6/10. Published 2022-05-05.

How severe is CVE-2021-38423?

Medium severity. CVSS v3 base score is 6.6 out of 10.

Vulnerability in Gurum Gurumdds

CVE-2021-38423

All versions of GurumDDS improperly calculate the size to be used when allocating the buffer, which may result in a buffer overflow.

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

CVSS v3 metric

CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H.

EPSS exploit prediction

EPSS: 0.013 (69.3th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.013 · change: +0.001

Affected products

Gurum Gurumdds
Gurumnetworks Gurumdds — versions all versions

Weakness classification (CWE)

CWE-131 — Incorrect Calculation of Buffer Size

References

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

Frequently asked questions

What is CVE-2021-38423?: CVE-2021-38423 is a medium-severity vulnerability in Gurum Gurumdds, classified under Incorrect Calculation of Buffer Size. CVSS score: 6.6/10. Published 2022-05-05.
How severe is CVE-2021-38423?: Medium severity. CVSS v3 base score is 6.6 out of 10.