CVE-2026-43743 Apple CVE debrief

Who should care

Users of Apple devices, particularly those using iOS, iPadOS, macOS, tvOS, and watchOS, should apply the provided patches to prevent potential system termination caused by malicious apps. This is a medium priority vulnerability, and users should ensure that their devices are updated to the latest versions: iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, watchOS 26.6.

Technical summary

The vulnerability, CVE-2026-43743, is a race condition issue that was addressed with improved state handling. It affects various Apple operating systems, including iOS, iPadOS, macOS, tvOS, and watchOS. The CVSS score for this vulnerability is 4.7, indicating a medium severity level. The vector is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H. This information is based on the NVD entry and the CVE record.

Defensive priority

Medium priority should be given to patching this vulnerability, as it could potentially lead to system termination. Users should ensure that their devices are updated to the latest versions and monitor system logs for unexpected terminations that could indicate exploitation attempts. Compensating controls, such as monitoring and detection, should be reviewed for exposed systems while remediation is scheduled and verified. Asset inventory and rollback/change windows should also be considered to minimize potential impact. Source tracking and exposure review are also recommended to ensure that the vulnerability is properly managed. Additionally, vendor patch guidance should be followed to ensure that the vulnerability is properly patched. The system should be checked for exceptions, and retested remediated assets should be verified before closing the item.

Recommended defensive actions

• Apply the patches provided by Apple for the affected operating systems.
• Ensure all Apple devices are updated to the latest versions: iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, watchOS 26.6.
• Monitor system logs for unexpected terminations that could indicate exploitation attempts.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record was published on 2026-06-29T20:17:37.783Z and was last modified on 2026-07-27T21:16:58.937Z. The NVD entry is currently Modified. This information is based on the NVD entry and the CVE record. The vulnerability affects various Apple operating systems, including iOS, iPadOS, macOS, tvOS, and watchOS. The CVSS score for this vulnerability is 4.7, indicating a medium severity level.

Official resources