They absolutely do. Any member of the armed forces, or any veteran for that matter, has access to OSISS, as do their families.
For those special service forces members who have participated in operations that have a high security classification, if there's any issue with benefits for Veterans Affairs, I personally review their file and provide Veterans Affairs with a letter that provides a level of detail that they need to be certain that things are as the member states, but that also respects the security classification of the documents, and the member obtains his benefits that way.