CVE-2026-43689 in iOS
Summary
by MITRE • 09/15/2026
A permissions issue was addressed with additional restrictions. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, visionOS 27. A malicious app may be able to gain root privileges.
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Analysis
by VulDB Data Team • 09/15/2026
The disclosed vulnerability represents a critical failure in the operating system's privilege escalation controls, specifically within the permission management subsystem of Apple mobile and desktop platforms including iOS, iPadOS, macOS, and visionOS. This flaw allows an application that has been granted standard user-level permissions to bypass security boundaries and execute code with root privileges. Root access is the highest level of authority in Unix-like operating systems, granting unrestricted control over system resources, configuration files, and kernel modules. The presence of this vulnerability indicates a breakdown in the principle of least privilege, where applications are expected to operate with only the minimum permissions necessary for their function rather than having broad administrative capabilities by default or through exploitation.
The technical nature of this flaw likely involves an improper handling of access control checks during system calls or inter-process communication mechanisms that govern elevation of privileges. In many such cases, a malicious app may exploit logic errors in how the operating system validates requests for elevated rights, potentially leveraging race conditions, misconfigured default policies, or insufficient validation of input parameters passed to privileged daemons. By gaining root access, an attacker can completely compromise the integrity and confidentiality of the device. This includes the ability to install persistent backdoors, exfiltrate sensitive user data such as passwords and financial information, modify system binaries to evade detection by security software, and disable built-in security features like sandboxing or encryption protections.
The operational impact of this vulnerability is severe due to its potential for widespread compromise across multiple device types. Since the fix is included in iOS 26.7, iPadOS 26.7, macOS Golden Gate 27, visionOS 27, and their respective version 27 releases, it suggests that older or unpatched devices remain at significant risk. Attackers can distribute malicious applications through various vectors including phishing campaigns, compromised app store listings if review processes are bypassed, or supply chain attacks targeting legitimate software updates. Once installed, the malware operates with full system control, making it extremely difficult to detect and remove without a complete factory reset of the device. This level of access also facilitates lateral movement in enterprise environments where managed devices communicate over internal networks, potentially leading to broader organizational breaches.
To mitigate this risk, immediate action is required to ensure all affected devices are updated to the patched versions mentioned above. System administrators should enforce mandatory update policies for iOS and iPadOS devices within their organizations using Mobile Device Management solutions. For macOS users, enabling automatic security updates ensures that patches like this one are applied promptly without user intervention. Additionally, developers must adhere strictly to secure coding practices, ensuring that applications do not request unnecessary privileges and that any elevation of privilege requests are rigorously validated against current system policies. Users should remain vigilant regarding app permissions, reviewing access grants regularly and removing unused applications to reduce the attack surface available to potential exploiters.
This vulnerability aligns with Common Weakness Enumeration categories such as CWE-269 Improper Privilege Management or CWE-78 Improper Neutralization of Special Elements used in an OS Command if command injection is involved, though the primary classification remains related to privilege escalation mechanisms. In terms of MITRE ATT&CK framework mapping, this flaw facilitates techniques associated with Defense Evasion and Persistence, allowing attackers to maintain long-term access by modifying system configurations or installing rootkits that survive reboots and standard security scans. The resolution through OS updates highlights the importance of maintaining up-to-date software environments as a primary defense against complex privilege escalation attacks targeting core operating system components.