CVE-2026-86953
Medium
Description
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27, watchOS 27. An attacker in physical proximity may be able to cause a denial-of-service.
SeverityMedium
CVSS4.6
Exploit probability—
Product
macOS
PublishedOct 20, 2026
First seenOct 20, 2026
Weakness typeCWE-787Out-of-bounds write
How to fix
Update
- Apple macOS27 or later
- Apple iOS and iPadOS27 or later
- Apple tvOS27 or later
- Apple visionOS27 or later
- Apple watchOS27 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Apple macOS | v < 27 | 27 |
| Apple iOS and iPadOS | v < 27 | 27 |
| Apple tvOS | v < 27 | 27 |
| Apple visionOS | v < 27 | 27 |
| Apple watchOS | v < 27 | 27 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.