Question 1

What is the EOL Risk Score for Sophos Firewall 18.5 MR4?

Accepted Answer

Sophos Firewall 18.5 MR4 has an EOL Risk Score™ of 70 out of 100, placing it in the High risk band. The score is calculated from four factors: EOL Recency (40/40), Attack Surface (10/30), CISA KEV Exposure (20/20), and Extended Support Availability (0/10).

Question 2

Is Sophos Firewall 18.5 MR4 still supported?

Accepted Answer

Sophos Firewall 18.5 MR4 is no longer supported — it has passed its end of life date (June 30, 2023). No further security patches will be issued. Upgrade to a supported version or obtain extended lifecycle support.

Question 3

When does Sophos Firewall 18.5 MR4 reach end of life?

Accepted Answer

Sophos Firewall 18.5 MR4 reached (or will reach) end of life on June 30, 2023. After this date, no security patches or bug fixes are issued by the vendor.

Question 4

What are the security risks of running Sophos Firewall 18.5 MR4 after end of life?

Accepted Answer

After end of life, Sophos Firewall 18.5 MR4 no longer receives security patches. Any newly discovered CVEs remain unpatched indefinitely. Organizations running EOL software also face compliance violations under SOC 2, PCI DSS, HIPAA, and ISO 27001, which require use of supported software versions.