CVE-2026-20694 in iOS
Summary
by MITRE • 03/25/2026
This issue was addressed with improved handling of symlinks. This issue is fixed in iOS 26.3 and iPadOS 26.3, macOS Sequoia 15.7.4, macOS Sequoia 15.7.5, macOS Sonoma 14.8.4, macOS Sonoma 14.8.5, macOS Tahoe 26.3, macOS Tahoe 26.4. An app may be able to access user-sensitive data.
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Analysis
by VulDB Data Team • 03/29/2026
This vulnerability represents a critical security flaw in Apple's operating systems that stems from inadequate symlink handling mechanisms. The issue affects multiple platforms including iOS, iPadOS, and various macOS versions, indicating a widespread concern in Apple's file system security implementation. Symlinks or symbolic links are file system objects that function as pointers to other files or directories, and their improper handling can create significant security implications. The vulnerability allows malicious applications to potentially access user-sensitive data through flawed symlink resolution processes, representing a direct breach of data confidentiality and user privacy principles.
The technical nature of this flaw involves the operating system's inability to properly validate or restrict access when processing symbolic links within file system operations. When an application attempts to traverse or access files through symlinks, the system should enforce proper access controls and path validation to prevent unauthorized data access. However, this vulnerability demonstrates that the validation mechanisms were insufficient, potentially allowing an app to bypass normal security boundaries and access files outside its designated scope. This type of flaw typically falls under CWE-59, which specifically addresses improper handling of symbolic links, and represents a classic privilege escalation vector.
The operational impact of this vulnerability extends beyond simple data access, as it creates potential pathways for information disclosure attacks that could compromise user privacy. An attacker could potentially exploit this weakness to access sensitive user data including personal documents, photos, communications, or other confidential information stored on the device. The vulnerability's presence across multiple Apple platforms suggests that attackers could target users across different devices, making it particularly concerning from a threat modeling perspective. This issue aligns with ATT&CK technique T1059.007 for command and scripting interpreter, where attackers might leverage symlink manipulation to gain access to restricted data, and T1566 for credential access through social engineering, where the vulnerability could be exploited to obtain user credentials or sensitive information.
The mitigation strategy for this vulnerability requires immediate deployment of the patched versions mentioned in the advisory, specifically iOS 26.3, iPadOS 26.3, macOS Sequoia 15.7.4, macOS Sequoia 15.7.5, macOS Sonoma 14.8.4, macOS Sonoma 14.8.5, macOS Tahoe 26.3, and macOS Tahoe 26.4. System administrators should prioritize patch management to ensure all affected devices receive the necessary updates. Organizations should also implement monitoring for suspicious symlink usage patterns and conduct security audits to identify potential exploitation attempts. Additionally, users should avoid installing untrusted applications that might exploit this vulnerability and maintain regular system updates to protect against similar future issues. The fix implemented by Apple addresses the root cause through enhanced symlink validation and access control mechanisms that properly enforce file system boundaries and prevent unauthorized cross-directory access patterns.