There is simple way for one to keep track of the latest product version, release date, support life cycle ( End of life/End of Support life) for all the Symantec products.
Visit the page https://support.symantec.com/en_US/product-a-z.html
Click on the product for which the details needs to be checked. For example, in the screen capture below 'Endpoint Protection' is selected
A new page will be shown having the details like Alerts, Recommendations, Articles etc. At the left bottom of the page , 'Release Details" can be found. By default the latest version is shown in the field. To check for older version of the product , the version can be selected from the drop down.
The release details shows the version name, release type, release date , EOL/EOSL ( if applicable).
The above example if for Endpoint Protection, similar details for the other Symantec products can be found using the link provided above..