CVE-2023-5552

Name: CVE-2023-5552
Creator: NVD / NIST
Published: 2023-10-18T00:15:10.257+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.50%

Last modified Jun 17, 2026

CVE-2023-5552 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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”.. EPSS estimates a 0.50% chance of exploitation in the next 30 days.

Description

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”.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.50%

38.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Sophos	Firewall	<= 19.5.3

References

https://www.sophos.com/en-us/security-advisories/sophos-sa-20231017-spx-passwordVendor Advisory
https://www.sophos.com/en-us/security-advisories/sophos-sa-20231017-spx-passwordVendor Advisory

Timeline

Published: Oct 18, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-5552?

How severe is CVE-2023-5552?

CVE-2023-5552 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.50% probability of exploitation in the next 30 days.

How do I fix CVE-2023-5552?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-5552?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST