What is CVE-2021-28665?

CVE-2021-28665 is a high-severity vulnerability in Stormshield Network Security, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 7.5/10. Published 2021-05-06.

How severe is CVE-2021-28665?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Stormshield Network Security

CVE-2021-28665

Stormshield SNS with versions before 3.7.18, 3.11.6 and 4.1.6 has a memory-management defect in the SNMP plugin that can lead to excessive consumption of memory and CPU resources, and possibly a denial of service.

Published 2021-05-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.010 (61.9th percentile), scored 2026-10-21.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 62nd percentile — 61.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

advisories.stormshield.eu/ (Vendor Advisory)
advisories-admin.stormshield.eu/2021-014 (Broken Link)

Frequently asked questions

What is CVE-2021-28665?: CVE-2021-28665 is a high-severity vulnerability in Stormshield Network Security, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 7.5/10. Published 2021-05-06.
How severe is CVE-2021-28665?: High severity. CVSS v3 base score is 7.5 out of 10.