CVE-2026-43809: An app may be able to cause unexpected system termination in Apple iOS and iPadOS
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. An app may be able to cause unexpected system termination.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-43809) in Apple macOS is caused by an out-of-bounds read condition, which was mitigated by improved bounds checking in specific macOS versions. An unprivileged application could exploit this flaw to cause unexpected system termination, potentially leading to denial of service or other impacts. The issue is fixed in macOS Sequoia 15.7.8, Sonoma 14.8.8, and Tahoe 26.6. There is no indication of known exploits in the wild at this time.
Potential Impact
Successful exploitation may allow an unprivileged app to cause unexpected system termination, impacting system availability and potentially leading to denial of service. The CVSS score of 9.8 reflects high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
A fix is available in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6. Users and administrators should update to these versions or later to remediate this vulnerability. No other mitigation guidance is provided.
CVE-2026-43809: An app may be able to cause unexpected system termination in Apple iOS and iPadOS
Description
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. An app may be able to cause unexpected system termination.
CVSS v3.1
Score 9.8critical
Affected software
Apple
iOS and iPadOS
Apple
macOS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-43809) in Apple macOS is caused by an out-of-bounds read condition, which was mitigated by improved bounds checking in specific macOS versions. An unprivileged application could exploit this flaw to cause unexpected system termination, potentially leading to denial of service or other impacts. The issue is fixed in macOS Sequoia 15.7.8, Sonoma 14.8.8, and Tahoe 26.6. There is no indication of known exploits in the wild at this time.
Potential Impact
Successful exploitation may allow an unprivileged app to cause unexpected system termination, impacting system availability and potentially leading to denial of service. The CVSS score of 9.8 reflects high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
A fix is available in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6. Users and administrators should update to these versions or later to remediate this vulnerability. No other mitigation guidance is provided.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-05-01T22:46:27.821Z
- State
- PUBLISHED
Threat ID: 6a67c1bc9c2644c7f8cb1180
Added to database: 07/27/2026, 20:38:20 UTC
Last enriched: 07/29/2026, 23:46:22 UTC
Last updated: 09/11/2026, 22:08:27 UTC
Views: 59
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.