Integer Overflow Vulnerability in Apple's Operating Systems
CVE-2026-64766

7.8HIGH

Key Information:

Vendor

Apple
Status
iOS And iPad OS
Mac OS
TV OS
Visionos
Vendor
CVE Published:
27 July 2026

What is CVE-2026-64766?

An integer overflow vulnerability has been identified affecting multiple Apple operating systems. This vulnerability arises from insufficient input validation, which may allow a maliciously crafted file to cause unexpected termination of applications or potentially lead to arbitrary code execution. Apple has addressed this issue in recent updates, urging users to upgrade to the latest versions of iOS, iPadOS, macOS, tvOS, visionOS, and watchOS to mitigate the risk.

Affected Version(s)

iOS and iPadOS 0 < 18.7.10

iOS and iPadOS 0 < 26.6

macOS 0 < 14.8.8

References

https://support.apple.com/en-us/128066
https://support.apple.com/en-us/128067
https://support.apple.com/en-us/128068

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.