CVE-2026-64770
A critical flaw in Apple’s operating systems allows a remote attacker to write data beyond intended memory limits, potentially crashing apps or corrupting memory. The issue has been fixed in the latest releases of iOS, iPadOS, macOS, tvOS, and visionOS.
An official fix is available, so this entry is kept for 30 days and then removed automatically.
Who is affected
Apple devices running iOS, iPadOS, macOS (Sequoia, Sonoma, Tahoe), tvOS, or visionOS that are not updated to the latest versions (iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6).
Real-world impact
An attacker could trigger application crashes or corrupt memory, leading to denial‑of‑service or potentially enabling arbitrary code execution if the corruption is exploited further.
Why this severity
The CVSS score of 9.8 reflects a network‑based attack with low complexity, no required privileges or user interaction, and full impact on confidentiality, integrity, and availability.
What to do about it
- 01Update the device to the latest OS version (iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, or visionOS 26.6).
- 02Restart the device after the update to ensure the changes take effect.
NVD-referenced vendor advisory
Timeline
- Jul 27, 2026 · 3d agoPublishedDisclosed and added to the National Vulnerability Database.
- Jul 28, 2026 · 2d agoOfficial fix availableA vendor patch or mitigation now exists — see the remediation steps above.
How it’s attacked
References & advisories
- support.apple.com/en-us/128066release notesvendor advisory
- support.apple.com/en-us/128067release notesvendor advisory
- support.apple.com/en-us/128069release notesvendor advisory
- support.apple.com/en-us/128070release notesvendor advisory
- support.apple.com/en-us/128071release notesvendor advisory
- support.apple.com/en-us/128072release notesvendor advisory