What is CVE-2022-0331?

CVE-2022-0331 is a medium-severity vulnerability in Sophos Sfos. CVSS score: 5.3/10. Published 2022-03-29.

How severe is CVE-2022-0331?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Sophos Sfos

CVE-2022-0331

An information disclosure vulnerability in Webadmin allows an unauthenticated remote attacker to read the device serial number in Sophos Firewall version v18.5 MR2 and older.

Published 2022-03-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.015 (73.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Sophos Sfos
Sophos Firewall — versions unspecified

References

www.sophos.com/en-us/security-advisories/sophos-sa-20220328-sfos-18-5-3 (Vendor Advisory)

Frequently asked questions

What is CVE-2022-0331?: CVE-2022-0331 is a medium-severity vulnerability in Sophos Sfos. CVSS score: 5.3/10. Published 2022-03-29.
How severe is CVE-2022-0331?: Medium severity. CVSS v3 base score is 5.3 out of 10.