CVE-2026-43807 Apple CVE debrief

Who should care

Organizations and individuals using affected Apple devices and operating systems, including iOS, iPadOS, macOS, tvOS, visionOS, and watchOS, should prioritize patching and review compensating controls for malicious accessory usage. Security teams and vulnerability management teams should verify affected systems and plan for mitigation.

Technical summary

A buffer overflow vulnerability, addressed with improved bounds checking, exists in various Apple operating systems and devices, including iOS, iPadOS, macOS, tvOS, visionOS, and watchOS. A malicious accessory may cause unexpected app termination. The vulnerability has been patched by Apple, and users are advised to apply the patches for affected systems. Security teams and vulnerability management teams should verify affected systems and plan for mitigation. The vulnerability has a critical CVSS score of 9.8 and has been patched by Apple. Defenders should verify affected Apple devices and operating systems and review compensating controls for malicious accessory usage.

Defensive priority

High priority due to critical CVSS score of 9.8 and potential for unexpected app termination via malicious accessory.

Recommended defensive actions

• Inventory and verify affected Apple devices and operating systems
• Apply patches from Apple for affected systems
• Monitor for unexpected app termination
• Implement compensating controls for malicious accessory usage
• Review vendor guidance for mitigation
• Conduct exposure review for potentially affected systems
• Track changes to affected systems and components

Evidence notes

Evidence from official CVE and NVD sources indicates a buffer overflow vulnerability addressed by Apple through improved bounds checking in various operating systems and devices. The CVE record was published on 2026-07-27T21:17:03.950Z and has not been modified since then. The NVD entry is currently Modified. Defenders should verify affected Apple devices and operating systems, including iOS, iPadOS, macOS, tvOS, visionOS, and watchOS, and review compensating controls for malicious accessory usage.

Official resources