CVE-2025-43479: 
macOS vulnerability analysis and mitigation

CVE-2025-43479 is a permissions issue in the CoreServices component of Apple macOS that allows a malicious app to access sensitive user data. The vulnerability was disclosed on November 3, 2025, and affects macOS Sonoma 14.x before 14.8.2, macOS Sequoia 15.x before 15.7.2, and is also addressed in macOS Tahoe 26.1. It was reported by an anonymous researcher. The vulnerability carries a CVSS v3.1 base score of 5.5 (Medium) (Apple Advisory Sequoia, Apple Advisory Sonoma, Apple Advisory Tahoe).

The root cause is a permissions issue (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) in the macOS CoreServices framework, addressed by applying additional access restrictions. The attack vector is local, requiring user interaction but no special privileges, meaning a malicious app running in the user's context could exploit insufficient permission controls to read sensitive user data it should not have access to. No public technical write-up or proof-of-concept code has been identified at this time (Apple Advisory Sequoia, Apple Advisory Sonoma).

Successful exploitation allows a malicious application to access sensitive user data that should be protected by macOS permission controls within the CoreServices component. The impact is limited to confidentiality — there is no integrity or availability impact. The vulnerability does not enable remote code execution or privilege escalation on its own, but unauthorized data access could expose personal files, credentials, or other protected information stored on the affected macOS system (Apple Advisory Sequoia, Apple Advisory Sonoma).

There is no known public proof-of-concept exploit or evidence of in-the-wild exploitation for CVE-2025-43479. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. The EPSS score is approximately 0.015%, indicating a very low probability of exploitation in the near term. The attack requires local access and user interaction, further limiting its exploitability (Apple Advisory Sequoia, Apple Advisory Sonoma).

Apple has released patches addressing this vulnerability in macOS Sonoma 14.8.2, macOS Sequoia 15.7.2, and macOS Tahoe 26.1, all released on November 3, 2025. Users should update their macOS installations to these versions or later as soon as possible. No configuration-based workarounds have been published by Apple; upgrading to a patched version is the recommended remediation (Apple Advisory Sequoia, Apple Advisory Sonoma, Apple Advisory Tahoe).

The vulnerability was noted in the SANS Internet Storm Center diary covering the November 2025 Apple security updates, which highlighted the broad scope of fixes across macOS versions. The CIS also published an advisory noting multiple vulnerabilities in Apple products patched in this release cycle. No significant individual researcher commentary or social media discussion specific to CVE-2025-43479 has been identified, consistent with its medium severity and lack of public exploit code.