CVE-2026-43739: An app may be able to cause unexpected system termination in Apple iOS and iPadOS
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. An app may be able to cause unexpected system termination.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds write condition in Apple iOS and iPadOS that could be triggered by a malicious app to cause unexpected system termination (denial of service). The issue is resolved by improved bounds checking in iOS 26.6 and iPadOS 26.6. The CVSS vector indicates local attack vector, low complexity, no privileges required, user interaction required, unchanged scope, no confidentiality or integrity impact, and high impact on availability.
Potential Impact
An attacker with local access and user interaction could exploit this vulnerability to cause the affected device to terminate unexpectedly, resulting in denial of service. There is no impact on confidentiality or integrity of the system. No known exploits are currently reported in the wild.
Mitigation Recommendations
A fix is available in iOS 26.6 and iPadOS 26.6. Users and administrators should update affected devices to these versions or later to remediate the vulnerability. No additional mitigation guidance is provided or required.
CVE-2026-43739: An app may be able to cause unexpected system termination in Apple iOS and iPadOS
Description
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. An app may be able to cause unexpected system termination.
CVSS v3.1
Score 5.5medium
Affected software
Apple
iOS and iPadOS
Apple
macOS
Apple
tvOS
Apple
visionOS
Apple
watchOS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds write condition in Apple iOS and iPadOS that could be triggered by a malicious app to cause unexpected system termination (denial of service). The issue is resolved by improved bounds checking in iOS 26.6 and iPadOS 26.6. The CVSS vector indicates local attack vector, low complexity, no privileges required, user interaction required, unchanged scope, no confidentiality or integrity impact, and high impact on availability.
Potential Impact
An attacker with local access and user interaction could exploit this vulnerability to cause the affected device to terminate unexpectedly, resulting in denial of service. There is no impact on confidentiality or integrity of the system. No known exploits are currently reported in the wild.
Mitigation Recommendations
A fix is available in iOS 26.6 and iPadOS 26.6. Users and administrators should update affected devices to these versions or later to remediate the vulnerability. No additional mitigation guidance is provided or required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-05-01T22:46:21.646Z
- State
- PUBLISHED
Threat ID: 6a67c1b59c2644c7f8cb0e6e
Added to database: 07/27/2026, 20:38:13 UTC
Last enriched: 07/29/2026, 23:33:30 UTC
Last updated: 09/10/2026, 20:02:34 UTC
Views: 110
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