This vulnerability (CVE-2026-28825) is caused by an out-of-bounds write condition in macOS, which was addressed by improved bounds checking. Exploitation could enable an application to modify protected file system areas, potentially impacting system integrity and availability. The issue affects multiple macOS versions prior to the specified patched releases. The CVSS v3.1 base score is 7.1, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, no confidentiality impact, limited integrity impact, and high availability impact.

An attacker who successfully exploits this vulnerability could modify protected parts of the macOS file system, potentially leading to system instability or denial of service. There is no indication of confidentiality compromise. No known exploits are currently reported in the wild.

Apple has released official patches addressing this vulnerability in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, and macOS Tahoe 26.4. Users and administrators should apply these updates promptly to remediate the issue. Patch status is confirmed by the vendor advisory stating the issue is fixed in these versions.