Buffer Overflow Vulnerability in macOS Tahoe from Apple
CVE-2026-64691

9.8CRITICAL

Key Information:

Vendor

Apple
Status
Mac OS
Vendor
CVE Published:
27 July 2026

What is CVE-2026-64691?

A buffer overflow vulnerability was identified in macOS Tahoe 26.6, which could allow an application to exploit inadequate size validation. This flaw might lead to unexpected system termination, posing potential risks to user data and system integrity. Apple has implemented improvements in size validation to mitigate this issue.

Affected Version(s)

macOS 0 < 26.6

References

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

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.