Critical· 9.8official fix available
CVE-2026-64720
CVE-2026-64720 is a critical race condition vulnerability (CWE-362) in Apple operating systems. It allows an app to trigger unexpected system crashes. The flaw is resolved in iOS 26.6, iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, and watchOS 26.6.
publishedJul 27, 2026
last modifiedJul 28, 2026
sourcesNVD
severity · cvss
9.8
critical · how bad it is
exploitation · epss
<1%
26th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Aug 27, 2026
An official fix is available, so this entry is kept for 30 days and then removed automatically.
01
Who is affected
Users of iOS 26.6, iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, or watchOS 26.6
02
Real-world impact
Could cause apps to crash the system unexpectedly
03
Why this severity
CVSS 9.8 (critical): High risk of system disruption with no user interaction required
04
What to do about it
official fix available
recommended steps
- 011. Upgrade your device to iOS 26.6, iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, or watchOS 26.6.
- 022. Ensure all apps are updated to their latest versions after the OS upgrade.
NVD description stating the fix is available in specified OS versions
05
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.
06
How it’s attacked
Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeUnchanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07
References & advisories
- support.apple.com/en-us/128066release notesvendor advisory
- support.apple.com/en-us/128067release notesvendor advisory
- support.apple.com/en-us/128068release notesvendor advisory
- support.apple.com/en-us/128069release notesvendor advisory
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →