CVE-2021-30755: Apple macOS

Medium severity, CVSS 6.5. EPSS: 1.3% chance of exploitation in the next 30 days.

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

• Apple macOS: from 11.0, before 11.4 (fixed in 11.4)
• Apple tvOS: before 14.6 (fixed in 14.6)
• Apple watchOS: before 7.5 (fixed in 7.5)

Published 2021-09-08. Last modified 2026-06-17.