CVE-2026-43803

CriticalCVSS 9.8

Published: 27/07/2026(UTC)Updated: 28/07/2026(UTC)Translated: 28/07/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.57%

44th percentile - higher than 44% of all known CVEs

Summary

An out-of-bounds write in Apple systems. Fixed by improving bounds checking. A remote attacker may cause unexpected system termination.

Risk Assessment

Risk of remote unexpected system termination, potentially leading to service disruption and data loss.

Recommendation

Update iOS, iPadOS, macOS, tvOS, visionOS, and watchOS to the latest versions listed in the description.

Original NVD description (English source)

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. A remote attacker may be able to cause unexpected system termination.