CVE-2026-84521: An app may be able to cause unexpected system termination in Apple iOS and iPadOS
CVE-2026-84521 is a use-after-free vulnerability in Apple iOS and iPadOS that could allow an app to cause unexpected system termination. The issue was addressed with improved memory management and fixed in iOS 26.7, iPadOS 26.7, iOS 27, iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, and visionOS 27.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition in Apple iOS and iPadOS, which could be exploited by an application to cause unexpected system termination (crash). The flaw was mitigated by Apple through improved memory management techniques. The fix is included in iOS 26.7 and later versions, iPadOS 26.7 and later, as well as corresponding versions of macOS and visionOS.
Potential Impact
An attacker controlling a malicious app could trigger unexpected system termination, potentially causing denial of service on affected devices. There is no indication of code execution or data leakage from the provided information.
Mitigation Recommendations
Apply the official updates from Apple: upgrade to iOS 26.7 or later, iPadOS 26.7 or later, macOS Sequoia 15.8 or later, macOS Golden Gate 27 or later, macOS Tahoe 26.7 or later, or visionOS 27 or later. These versions include the fix for this vulnerability.
CVE-2026-84521: An app may be able to cause unexpected system termination in Apple iOS and iPadOS
Description
CVE-2026-84521 is a use-after-free vulnerability in Apple iOS and iPadOS that could allow an app to cause unexpected system termination. The issue was addressed with improved memory management and fixed in iOS 26.7, iPadOS 26.7, iOS 27, iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, and visionOS 27.
Affected software
Apple
iOS and iPadOS
Apple
macOS
Apple
visionOS
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free condition in Apple iOS and iPadOS, which could be exploited by an application to cause unexpected system termination (crash). The flaw was mitigated by Apple through improved memory management techniques. The fix is included in iOS 26.7 and later versions, iPadOS 26.7 and later, as well as corresponding versions of macOS and visionOS.
Potential Impact
An attacker controlling a malicious app could trigger unexpected system termination, potentially causing denial of service on affected devices. There is no indication of code execution or data leakage from the provided information.
Mitigation Recommendations
Apply the official updates from Apple: upgrade to iOS 26.7 or later, iPadOS 26.7 or later, macOS Sequoia 15.8 or later, macOS Golden Gate 27 or later, macOS Tahoe 26.7 or later, or visionOS 27 or later. These versions include the fix for this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-09-01T21:13:17.749Z
- State
- PUBLISHED
Threat ID: 6aa8610455bf5e2cf59d2845
Added to database: 09/14/2026, 21:03:00 UTC
Last enriched: 09/14/2026, 22:30:50 UTC
Last updated: 09/15/2026, 03:01:23 UTC
Views: 3
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.