How severe is CVE-2021-37613?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Stormshield Network Security

CVE-2021-37613

Stormshield Network Security (SNS) 1.0.0 through 4.2.3 allows a Denial of Service.

Published 2022-02-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (32.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Stormshield Network Security

References

advisories.stormshield.eu (Vendor Advisory)
advisories.stormshield.eu/2021-050/ (Vendor Advisory)

Frequently asked questions

What is CVE-2021-37613?: CVE-2021-37613 is a medium-severity vulnerability in Stormshield Network Security. CVSS score: 6.5/10. Published 2022-02-10.
How severe is CVE-2021-37613?: Medium severity. CVSS v3 base score is 6.5 out of 10.