CVE-2025-43465: 
macOS vulnerability analysis and mitigation

CVE-2025-43465 is a path traversal vulnerability in the ATS (Apple Text Services) component of macOS, where a parsing issue in the handling of directory paths could allow a malicious app to access sensitive user data. The vulnerability was disclosed on November 3, 2025, and fixed in macOS Tahoe 26.1. It affects all macOS versions prior to 26.1. The CVSS v3.1 base score is 5.5 (Medium) per NIST NVD, though CISA-ADP assessed it as 3.3 (Low) (Apple Advisory, NVD).

The vulnerability is classified as CWE-22 (Improper Limitation of a Pathname to a Restricted Directory — 'Path Traversal'). A parsing flaw in how the ATS component processes directory paths allows an attacker-controlled application to traverse outside its permitted directory scope and access files belonging to other users or protected system areas. Exploitation requires local access with low privileges and no user interaction, as the malicious app can directly invoke the vulnerable path-handling logic. Apple addressed the issue with improved path validation in macOS Tahoe 26.1 (Apple Advisory, NVD). The vulnerability was reported by an anonymous researcher.

Successful exploitation allows a locally installed application to read sensitive user data outside its sandboxed or permitted directory scope, resulting in a high confidentiality impact with no integrity or availability impact. The vulnerability does not enable code execution or privilege escalation on its own, but data exposed could include personal files, credentials, or other protected user information accessible to the ATS component. The scope is limited to the local macOS system running a version prior to 26.1 (Apple Advisory, NVD).

Apple has released a fix in macOS Tahoe 26.1, which addresses the path traversal issue through improved path validation in the ATS component. Users and administrators should update to macOS Tahoe 26.1 or later as the primary remediation. No official workaround has been published for systems that cannot be immediately updated (Apple Advisory).

The vulnerability was noted in the SANS Internet Storm Center diary covering the macOS Tahoe 26.1 security release, which addressed a large number of CVEs across multiple components. The CIS Security advisory also highlighted the broader macOS Tahoe 26.1 update as addressing multiple vulnerabilities that could allow for arbitrary code execution and data exposure. No specific researcher commentary or significant social media discussion focused exclusively on CVE-2025-43465 has been identified (SANS ISC, CIS Advisory).