Only notes notes so far = “macOS 11.5.2 includes bug fixes for your Mac.”
Apple just updated the security page
macOS Big Sur 11.5.2 – This update has no published CVE entries.
UPDATE: Howard Oakley found that Safari was updated to 14.1.2 (16618.104.22.168.6) along with additional private frameworks.
What has changed in macOS 11.5.2?
Installer and Update Details
Full Installer = 11.6GB
Delta Update Size 11.5.1 > 11.5.2 = 2.93GB
Combo Update Size 11.0.1 > 11.5.2 = 3-12GB
Full Software Update Size (Sometimes needed if your Mac os snapshot is unsealed) = 12GB
Safari Update – Updated = 14.1.2 (16622.214.171.124.6)
Intel Mac T2 Bridge OS = NOT UPDATED
Apple Silicon Firmware = NOT UPDATED
My What’s New in macOS Big Sur 11.5.2 Update Article
macOS Big Sur 11.5.2 Update (20G95) is Live! What’s New?
macOS Big Sur Full Installer Database (InstallAssistant.pkg)
macOS Big Sur Full Installer Database. Download Directly from Apple!
Apple Silicon IPSW macOS Restore File Database (Big Sur & Monterey Beta M1 Restores)
Apple Silicon M1 Full macOS Restore IPSW Firmware Files Database