ACTIVELY EXPLOITED
CVE-2021-1789: Apple Multiple Products Type Confusion Vulnerability
| Vendor | Apple |
|---|---|
| Product | Multiple Products |
| Actively exploited | Yes |
| Added to CISA KEV | 4 May 2022 |
| CISA federal deadline | 25 May 2022 |
| Weakness (CWE) | CWE-843 |
Required action (CISA's text)
Apply updates per vendor instructions.
Description (NVD)
A type confusion issue affecting multiple Apple products allows processing of maliciously crafted web content, leading to arbitrary code execution.
SOURCES
Other Apple flaws
- CVE-2024-27834: Apple Multiple Products Improper Authentication Vulnerability
- CVE-2026-86950: Apple Multiple Products Out-of-Bounds Write Vulnerability
- CVE-2026-65400: Apple macOS Improper Authentication Vulnerability
- CVE-2025-43520: Apple Multiple Products Classic Buffer Overflow Vulnerability
- CVE-2025-43510: Apple Multiple Products Improper Locking Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.