CVE-2025-43307 in macOS
Summary
by MITRE • 09/16/2025
This issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in macOS Tahoe 26. An app may be able to access sensitive user data.
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Analysis
by VulDB Data Team • 09/16/2025
This vulnerability represents a significant security weakness in macOS Tahoe 26 that allows applications to potentially access sensitive user data through improper access controls. The issue stems from insufficient validation mechanisms that fail to properly restrict data access permissions, creating opportunities for unauthorized data exposure. The vulnerability affects the operating system's core security model by undermining the fundamental principle of least privilege that should govern all application interactions with user information. Security researchers identified that the flaw enables malicious or poorly designed applications to bypass normal access restrictions and obtain data that should remain protected. The vulnerability impacts the integrity and confidentiality of user information, potentially exposing personal data, credentials, or other sensitive materials stored within the system.
The technical implementation of this vulnerability involves weaknesses in the system's permission checking mechanisms, which are categorized under CWE-284 - Improper Access Control. This flaw allows applications to perform unauthorized operations that should be restricted to privileged processes or users with proper authorization. The vulnerability operates at the kernel level or system services that handle user data access, making it particularly dangerous as it can be exploited by applications that do not have legitimate access to such resources. Attackers could leverage this weakness to gain access to personal information, system credentials, or other sensitive data that should be protected by the operating system's security architecture. The flaw demonstrates a failure in the system's security boundary enforcement, which is a critical component of the defense-in-depth strategy recommended by security frameworks.
The operational impact of this vulnerability extends beyond simple data exposure to encompass potential privilege escalation and broader system compromise. Malicious applications could use this weakness to gather intelligence about user activities, access stored passwords, or collect personal information that could be used for identity theft or other fraudulent activities. The vulnerability also affects the trust model of the operating system, as users expect their data to remain protected from unauthorized access. Security professionals note that this type of flaw can be particularly dangerous when combined with other vulnerabilities, creating pathways for more sophisticated attacks. The exploitation of this vulnerability could lead to long-term data compromise, as attackers might establish persistence mechanisms to maintain access to sensitive information over extended periods. Organizations relying on macOS Tahoe 26 systems face increased risk of data breaches and regulatory compliance violations.
Mitigation strategies for this vulnerability should include immediate deployment of the macOS Tahoe 26 update that addresses the access control issues. System administrators should conduct comprehensive security assessments to identify applications that might be exploiting this weakness or that could potentially be used as attack vectors. The implementation of additional monitoring controls can help detect unauthorized data access attempts and provide early warning of potential exploitation. Security teams should review application permissions and access controls to ensure that only necessary applications have access to sensitive data. Organizations should also implement network-based monitoring solutions to detect anomalous data access patterns that might indicate exploitation of this vulnerability. The remediation process should include regular security audits to verify that access controls remain properly enforced and that no unauthorized applications have been granted excessive privileges. According to the ATT&CK framework, this vulnerability aligns with techniques involving privilege escalation and credential access, making it critical to address through both immediate patching and ongoing security monitoring.