Improper privilege management in macOS - CVE-2026-84520
Published: September 15, 2026
Vulnerability identifier: #VU149869
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-84520
CWE-ID: CWE-269
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to an unspecified flaw in AppleFDEKeyStore when interacting with the component. A local user can exploit the flaw to escalate privileges on the system.
Affected software
macOS
How to mitigate CVE-2026-84520
Install update from vendor's website.
macOS - update to 27.0 26A428