CVE-2019-8766: Apple iCloud

High severity, CVSS 8.8. EPSS: 1.7% chance of exploitation in the next 30 days.

Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in watchOS 6.1, iCloud for Windows 11.0. Processing maliciously crafted web content may lead to arbitrary code execution.

Affected products

• Apple iCloud: before 10.8 (fixed in 10.8)
• Apple watchOS: before 6.1 (fixed in 6.1)

Published 2019-12-18. Last modified 2026-06-17.