CVE-2026-43762 in iOS
Summary
by MITRE • 09/15/2026
The issue was addressed with improved checks. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, visionOS 26.6. An app may be able to access user-sensitive data.
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Analysis
by VulDB Data Team • 09/19/2026
This vulnerability represents a critical failure in the operating system's enforcement of application sandboxing policies, specifically within iOS, iPadOS, macOS Tahoe, and visionOS versions prior to 26.6. The core technical flaw lies in insufficient validation checks during inter-process communication or file access operations. In modern mobile and desktop operating systems, applications are isolated from one another through strict permission models designed to prevent unauthorized data exchange. However, the identified defect allows an application to bypass these restrictions under specific conditions, effectively breaking the isolation boundary that protects user privacy. This lack of proper checks enables a malicious actor or compromised app to read files and access sensitive information belonging to other applications or system services without explicit authorization from the operating kernel or security framework.
The operational impact of this flaw is significant as it directly compromises data confidentiality for end users. An attacker leveraging this vulnerability could extract personally identifiable information, authentication credentials, financial records, or private communications stored on the device. Because the exploit relies on a logic error in permission validation rather than a buffer overflow or memory corruption issue, it may be difficult to detect through traditional signature-based security tools. The ability of an app to access user-sensitive data undermines trust in the platform's security model and exposes users to risks such as identity theft, financial fraud, and surveillance. This type of vulnerability is particularly dangerous because it can potentially be triggered by a seemingly benign application that has been compromised or designed with malicious intent from inception.
From a classification perspective, this issue aligns closely with CWE-200, which defines an Information Exposure vulnerability where sensitive information is disclosed to unauthorized actors. It also relates to CWE-732, concerning incorrect permission assignment for critical resources, as the flaw stems from inadequate access control mechanisms within the operating system's security architecture. In terms of adversary tactics, this behavior corresponds to ATT&CK technique T1005, which describes Data from Local System being collected by an attacker after gaining initial execution privileges on a target machine. The vulnerability allows for lateral movement or privilege escalation in scenarios where multiple applications are present, as the compromised app can pivot to access data stored by other trusted apps that have higher security clearance levels.
Mitigation strategies primarily involve immediate software updates to address the underlying code defects. Users and administrators must ensure that iOS 26.6, iPadOS 26.6, macOS Tahoe 26.6, and visionOS 26.6 are installed on all affected devices. These patches include improved checks within the security subsystems responsible for validating access requests between processes. Beyond patching, organizations should enforce strict app distribution policies to minimize the risk of installing unverified or malicious applications that could attempt to exploit this flaw. Additionally, enabling multi-factor authentication and monitoring for unusual data access patterns can help detect potential exploitation attempts in real-time. Security teams should also review application permissions regularly to ensure that apps only have access to the minimum necessary resources required for their functionality, thereby reducing the attack surface available to any future vulnerabilities of similar nature.