Apple hasn’t responded to Larry Seltzer’s request for confirmation on security updates for Mac OS X 10.8 Mountain Lion. No security updates are showing up in Software Update, or on Apples website, for those sticking for a while with the new version of OS X. Mavericks is offered as a free update, but Apple hasnt (at the time of writing) responded to his requests for confirmation one way or another. Apple has released lengthy details of the security vulnerabilities that Mavericks fixes.”]
Source: https://grahamcluley.com/apple-mountain-lion-security-updates/