CVE-2021-1870
Apple iOS, iPadOS, and macOS
Apple iOS, iPadOS, and macOS WebKit Remote Code Execution Vulnerability
What it is
Apple iOS, iPadOS, and macOS WebKit contain an unspecified logic vulnerability that allows a remote attacker to execute code. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.
What to do
Apply updates per vendor instructions.
Vendor notices and references
Description and required action as published by CISA. Full record at NVD.
Other Apple entries on the list
- Multiple Products Apple Multiple Products Improper Authentication Vulnerability CVE-2024-27834 · Nov 4, 2026
- Multiple Products Apple Multiple Products Out-of-Bounds Write Vulnerability CVE-2026-86950 · Sep 29, 2026
- macOS Apple macOS Improper Authentication Vulnerability CVE-2026-65400 · Aug 18, 2026
- Multiple Products Apple Multiple Products Classic Buffer Overflow Vulnerability CVE-2025-43520 · Mar 20, 2026
- Multiple Products Apple Multiple Products Improper Locking Vulnerability CVE-2025-43510 · Mar 20, 2026
- Multiple Products Apple Multiple Products Buffer Overflow Vulnerability CVE-2025-31277 · Mar 20, 2026