Question 1

What is the EOL Risk Score for SonicWall SonicOS 5.9?

Accepted Answer

SonicWall SonicOS 5.9 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 SonicWall SonicOS 5.9 still supported?

Accepted Answer

SonicWall SonicOS 5.9 is no longer supported — it has passed its end of life date (August 22, 2024). No further security patches will be issued. Upgrade to a supported version or obtain extended lifecycle support.

Question 3

When does SonicWall SonicOS 5.9 reach end of life?

Accepted Answer

SonicWall SonicOS 5.9 reached (or will reach) end of life on August 22, 2024. After this date, no security patches or bug fixes are issued by the vendor.

Question 4

What are the security risks of running SonicWall SonicOS 5.9 after end of life?

Accepted Answer

After end of life, SonicWall SonicOS 5.9 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.