Vulnerability · Published Sep 8, 2021 · Assigned by apple

CVE-2021-30766

High 7.8

In plain English

A high-severity security flaw in macOS from Apple. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 71% of all known vulnerabilities).

Severity (CVSS NVD)7.8High

Exploit odds (30 days)1.3%top 28.7% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

An out-of-bounds write was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.5, Security Update 2021-004 Catalina, Security Update 2021-005 Mojave. An application may be able to execute arbitrary code with kernel privileges.

Affected products (as reported)

Vendor	Product	Versions
Apple	Security Update - Catalina	unspecified – before 2021
Apple	macOS	unspecified – before 11.5
Apple	macOS	unspecified – before 2021

References

https://support.apple.com/en-us/HT212602 x_refsource_MISC
https://support.apple.com/en-us/HT212600 x_refsource_MISC
https://support.apple.com/en-us/HT212603 x_refsource_MISC