Please see the release notes for 5.1.3...
Cisco Secure Client 5.1.3.62 New Features
This release includes the following features and support updates, and resolves the defects described in Cisco Secure Client 5.1.3.62.
macOS 11 is no longer support...
I don't think the acsocktool.exe would have nothing to do with SAML authentication which is the focus of CVE-2024-20337. It seems as though Windows Defender is simply looking at the version numbers and determining a vulnerability.