CVE-2025-43520
MediumActively exploited (CISA KEV)
Description
A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1, macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, watchOS 26.1. A malicious application may be able to cause unexpected system termination or write kernel memory.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Apple Multiple Products
PublishedDec 12, 2025
First seenDec 12, 2025
Added to KEVMar 20, 2026
Weakness typeCWE-120CWE-120
How to fix
CISA required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA due date: Apr 3, 2026Update
- apple ipados18.7.2 or later
- apple iphone_os18.7.2 or later
- apple macos14.8.2, 15.7.2 or later
- apple tvos26.1 or later
- apple visionos26.1 or later
- apple watchos26.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apple ipados | v < 18.7.2, 26.0 | 18.7.2 |
| apple iphone_os | v < 18.7.2, 26.0 | 18.7.2 |
| apple macos | 14.0 ≤ v < 14.8.2, 15.0 ≤ v < 15.7.2, 26.0 | 14.8.2, 15.7.2 |
| apple tvos | v < 26.1 | 26.1 |
| apple visionos | v < 26.1 | 26.1 |
| apple watchos | v < 26.1 | 26.1 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
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