AlertsApple Security Advisory

Number: AV21-353
Date: 22 July 2021

On 19 and 21 July 2021 Apple published Security Updates to address vulnerabilities in the following products:

  • tvOS - versions prior to 14.7
  • watchOS – versions prior to 7.6
  • iOS – versions prior to 14.7
  • iPadOS – versions prior to 14.7
  • Safari – versions prior to 14.1.2
  • macOS Catalina – versions prior to Security Update 2021-004
  • macOS Big Sur – versions prior to 11.5
  • MacOS Mojave – versions prior to Security Update 2021-005

Exploitation of some of these vulnerabilities could result in arbitrary code execution, unexpected application termination, elevation of privileges, circumvention of sandbox restrictions, denial of service, disclosure of information and bypass of signing checks or permissions.

The Cyber Centre encourages users and administrators to review the following web link and apply the necessary updates.

Apple Security Updates

Note to Readers

The Canadian Centre for Cyber Security (Cyber Centre) operates as part of the Communications Security Establishment.  We are Canada’s national authority on cyber security and we lead the government’s response to cyber security events. As Canada's national computer security incident response team, the Cyber Centre works in close collaboration with government departments, critical infrastructure, Canadian businesses and international partners to prepare for, respond to, mitigate, and recover from cyber events. We do this by providing authoritative advice and support, and coordinating information sharing and incident response. The Cyber Centre is outward-facing, welcoming partnerships that help build a stronger, more resilient cyber space in Canada.


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