Apple has published a security advisory, highlighting vulnerabilities in one of its products on 16th August 2021. It is recommended that you take the necessary precautions by ensuring your products are always updated.
For more information about this Apple update, you can follow this URL:
https://support.apple.com/en-us/HT212607
The Guyana National CIRT recommend that users and administrators review these updates and apply them where necessary.
PDF Download: Apple Security Update.pdf
References
https://cyber.gc.ca/en/alerts/apple-security-advisory-37
https://us-cert.cisa.gov/ncas/current-activity/2021/08/17/apple-releases-security-update