CVE-2026-65403 in iOS
Summary
by MITRE • 09/15/2026
This issue was addressed with improved checks. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, visionOS 27, watchOS 27. An app may be able to access sensitive user data.
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Analysis
by VulDB Data Team • 09/15/2026
The disclosed vulnerability represents a critical failure in the operating system's enforcement of application sandboxing and privacy boundaries, allowing an unauthorized process to bypass intended restrictions on accessing sensitive user information. This type of flaw typically stems from insufficient validation checks within the core security frameworks that govern inter-process communication or file system access permissions. When these checks are inadequate, they create a logical gap where an application can exploit misconfigured entitlements or race conditions in permission grants to retrieve data it should not be authorized to view. The resolution involved implementing stricter verification logic and enhancing the rigor of boundary enforcement mechanisms within the affected software components, ensuring that only explicitly permitted operations proceed while blocking unauthorized access attempts at a deeper system level.
From a technical perspective, this vulnerability aligns with common categories such as Improper Access Control or Broken Access Control, which are frequently cited in industry standards like CWE-269 and CWE-732 depending on the specific mechanism of failure. In the context of the MITRE ATT&CK framework, this behavior corresponds to techniques involving unauthorized access to local system resources, potentially falling under T1005 Data from Local System or more specifically T1530 Data from Cloud Storage if cloud-synced sensitive data was involved. The ability for an app to access sensitive user data implies that the attacker could exfiltrate personal identifiers, health records, financial information, or private communications without requiring additional exploits such as code injection or privilege escalation, making this a direct privacy violation with significant security implications.
The operational impact of this flaw is severe because it undermines the fundamental trust model of mobile and desktop operating systems where users expect strict isolation between applications. An adversary leveraging this vulnerability could silently harvest sensitive data in the background without user knowledge or consent, leading to potential identity theft, financial fraud, or corporate espionage depending on the nature of the compromised device and its usage context. Since the fix is deployed across a wide range of platforms including iOS, iPadOS, macOS, visionOS, and watchOS, it indicates that the underlying security architecture shared by these ecosystems contained this systemic weakness. Organizations relying on Apple devices for sensitive operations must ensure immediate patching to prevent potential data leakage through malicious or compromised third-party applications.
Mitigation strategies primarily involve ensuring all affected systems are updated to the specified versions which include iOS 26.7, iPadOS 26.7, iOS 27, iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, visionOS 27, and watchOS 27. Administrators should verify that automatic updates are enabled to receive these security patches promptly as they become available. Additionally, users should review application permissions regularly through the device settings interface, revoking access for any apps that do not require specific data categories such as contacts, photos, or location services. Implementing mobile device management policies can further restrict app installation sources and enforce stricter privacy configurations across enterprise fleets to reduce the attack surface presented by potentially malicious software attempting to exploit similar vulnerabilities in future updates.