Question 1

What is the EOL Risk Score for Google Chrome 53?

Accepted Answer

Google Chrome 53 has an EOL Risk Score™ of 80 out of 100, placing it in the Critical 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 (10/10).

Question 2

Is Google Chrome 53 still supported?

Accepted Answer

Google Chrome 53 is no longer supported — it has passed its end of life date (October 11, 2016). No further security patches will be issued. Upgrade to a supported version or obtain extended lifecycle support.

Question 3

When does Google Chrome 53 reach end of life?

Accepted Answer

Google Chrome 53 reached (or will reach) end of life on October 11, 2016. After this date, no security patches or bug fixes are issued by the vendor.

Question 4

What are the security risks of running Google Chrome 53 after end of life?

Accepted Answer

After end of life, Google Chrome 53 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.