CVE-2026-86921: A local attacker may be able to overwrite restricted files in Apple iOS and iPadOS
Description
CVE-2026-86921 is a local privilege vulnerability in Apple iOS and iPadOS where a permissions validation issue could allow a local attacker to overwrite restricted files. The issue has been addressed with improved validation and fixed in iOS and iPadOS versions 26.7 and later, including iOS 27 and iPadOS 27. This vulnerability affects versions prior to 26.7 and 27 respectively.
Affected software
Apple
iOS and iPadOS
Apple
macOS
Apple
visionOS
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a permissions issue in Apple iOS and iPadOS that could allow a local attacker to overwrite restricted files on the device. The flaw was mitigated by improving validation checks. The vendor fixed the issue in iOS 26.7, iPadOS 26.7, iOS 27, and iPadOS 27. No CVSS score is provided, and there are no known exploits in the wild at this time.
Potential Impact
A local attacker with access to the device could potentially overwrite restricted system files, which may lead to unauthorized modification of system behavior or data integrity issues. The exact impact beyond file overwrite is not detailed in the provided information.
Mitigation Recommendations
Apply the official fixes by upgrading to iOS 26.7, iPadOS 26.7, iOS 27, or iPadOS 27 or later versions. These versions include improved validation that addresses the permissions issue. No additional mitigation steps are indicated by the vendor.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-09-08T16:43:41.877Z
- State
- PUBLISHED
Threat ID: 6ad6c19d2cdf04f656e4a8b8
Added to database: 10/20/2026, 01:19:25 UTC
Last enriched: 10/20/2026, 01:48:47 UTC
Last updated: 10/20/2026, 01:48:47 UTC
Views: 3
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