CVE-2021-1771

3Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackepss 0.5%

exploitation probability

0.5%top 56% of all CVEs

observed exploitation

nono source reports it

This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave. A user that is removed from an iMessage group could rejoin the group.

Affected products

Apple · macOS

References

https://support.apple.com/en-us/HT212147