CVE-2026-64727: An app may be able to cause unexpected system termination in Apple macOS
A type confusion issue was addressed with improved memory handling. This issue is fixed in macOS Tahoe 26.6, tvOS 26.6. An app may be able to cause unexpected system termination.
AI Analysis
Technical Summary
This vulnerability involves a type confusion flaw in Apple macOS, which could be exploited by an application to trigger unexpected system termination. The underlying issue was mitigated by improving memory handling. The fix is included in macOS Tahoe 26.6 and tvOS 26.6. No known exploits are reported in the wild. The CVSS 3.1 base score is 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), reflecting network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation can lead to unexpected system termination, causing denial of service and potential compromise of system stability. The vulnerability affects confidentiality, integrity, and availability at a high level as per the CVSS score.
Mitigation Recommendations
A fix is available in macOS Tahoe 26.6 and tvOS 26.6. Users and administrators should update to these versions or later to remediate this vulnerability. Patch status is confirmed by the vendor advisory indicating the issue is fixed in these releases.
CVE-2026-64727: An app may be able to cause unexpected system termination in Apple macOS
Description
A type confusion issue was addressed with improved memory handling. This issue is fixed in macOS Tahoe 26.6, tvOS 26.6. An app may be able to cause unexpected system termination.
CVSS v3.1
Score 9.8critical
Affected software
Apple
macOS
Apple
tvOS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a type confusion flaw in Apple macOS, which could be exploited by an application to trigger unexpected system termination. The underlying issue was mitigated by improving memory handling. The fix is included in macOS Tahoe 26.6 and tvOS 26.6. No known exploits are reported in the wild. The CVSS 3.1 base score is 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), reflecting network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation can lead to unexpected system termination, causing denial of service and potential compromise of system stability. The vulnerability affects confidentiality, integrity, and availability at a high level as per the CVSS score.
Mitigation Recommendations
A fix is available in macOS Tahoe 26.6 and tvOS 26.6. Users and administrators should update to these versions or later to remediate this vulnerability. Patch status is confirmed by the vendor advisory indicating the issue is fixed in these releases.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-07-20T18:09:47.192Z
- State
- PUBLISHED
Threat ID: 6a67c1c39c2644c7f8cb142a
Added to database: 07/27/2026, 20:38:27 UTC
Last enriched: 07/29/2026, 23:30:32 UTC
Last updated: 09/11/2026, 22:08:26 UTC
Views: 63
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.