Vulnerability · Published Sep 8, 2021 · Assigned by apple

CVE-2021-30755

Medium 6.5

In plain English

A medium-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)6.5Medium

Exploit odds (30 days)1.3%top 28.8% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

Processing a maliciously crafted font may result in the disclosure of process memory. This issue is fixed in macOS Big Sur 11.4, tvOS 14.6, watchOS 7.5. An out-of-bounds read was addressed with improved input validation.

Affected products (as reported)

Vendor	Product	Versions
Apple	macOS	unspecified – before 11.4
Apple	macOS	unspecified – before 14.6
Apple	macOS	unspecified – before 7.5

References

https://support.apple.com/en-us/HT212529 x_refsource_MISC
https://support.apple.com/en-us/HT212532 x_refsource_MISC
https://support.apple.com/en-us/HT212533 x_refsource_MISC