Question 1

What is the EOL Risk Score for Windows 10 21H2 (E)?

Accepted Answer

Windows 10 21H2 (E) has an EOL Risk Score™ of 58 out of 100, placing it in the High risk band. The score is calculated from four factors: EOL Recency (8/40), Attack Surface (30/30), CISA KEV Exposure (20/20), and Extended Support Availability (0/10).

Question 2

Is Windows 10 21H2 (E) still supported?

Accepted Answer

Windows 10 21H2 (E) is currently supported. End of life is scheduled for January 12, 2027. Plan your migration before that date to avoid security risk.

Question 3

When does Windows 10 21H2 (E) reach end of life?

Accepted Answer

Windows 10 21H2 (E) reached (or will reach) end of life on January 12, 2027. After this date, no security patches or bug fixes are issued by the vendor.

Question 4

What are the security risks of running Windows 10 21H2 (E) after end of life?

Accepted Answer

After end of life, Windows 10 21H2 (E) 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.