What is CVE-2023-5552?

CVE-2023-5552 is a high-severity vulnerability in Sophos Firewall, classified under Information Disclosure. CVSS score: 7.1/10. Published 2023-10-18.

How severe is CVE-2023-5552?

High severity. CVSS v3 base score is 7.1 out of 10.

Information disclosure in Sophos Firewall

CVE-2023-5552

A password disclosure vulnerability in the Secure PDF eXchange (SPX) feature allows attackers with full email access to decrypt PDFs in Sophos Firewall version 19.5 MR3 (19.5.3) and older, if the password type is set to “Specified by sender”.

Vulnerability class: Information Disclosure

Published 2023-10-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.005 (40.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Sophos Firewall
Sophos Firewall — versions 19.5.4, 20.0.0

Weakness classification (CWE)

References

www.sophos.com/en-us/security-advisories/sophos-sa-20231017-spx-password (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2023-5552?: CVE-2023-5552 is a high-severity vulnerability in Sophos Firewall, classified under Information Disclosure. CVSS score: 7.1/10. Published 2023-10-18.
How severe is CVE-2023-5552?: High severity. CVSS v3 base score is 7.1 out of 10.