Security requirements specification

Answer:

Version of existing information system refers to the codification used to identify a released software, so you can track the correct documentation regarding the development of that system.

For example, version 1.0 is commonly used to denote the initial release of a program.

Considering that, for each existing information system in the ISMS scope you must contact the internal development team, or manufacturer, responsible for that system to identify which is the current version on production environment. For some systems this information may be found on the main screen or as a sub-option on the "About" feature.

If you think any of the comments included in the template explaining which information has to be included in each field needs further clarification please let me know your specific doubt, so I can provide you a proper answer.