CVE-2026-64712: Apple macOS Privilege Escalation Vulnerability

CVE-2026-64712 Overview

CVE-2026-64712 is a local privilege escalation vulnerability affecting multiple versions of Apple macOS. Apple addressed the issue with improved checks in macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7. A local application can exploit the flaw to gain root privileges, breaking the security boundary between user-level and system-level processes. The weakness is categorized under [CWE-284] Improper Access Control. Successful exploitation grants full administrative control over the affected system, enabling attackers to install persistent malware, disable security controls, and access protected data.

Critical Impact
A malicious local application can escalate to root privileges, giving an attacker complete control over the macOS host.

Affected Products

Apple macOS versions prior to Golden Gate 27
Apple macOS versions prior to Sequoia 15.8
Apple macOS versions prior to Tahoe 26.7

Discovery Timeline

2026-09-14 - CVE-2026-64712 published to NVD
2026-09-15 - Last updated in NVD database

Technical Details for CVE-2026-64712

Vulnerability Analysis

CVE-2026-64712 is an access control weakness in macOS that allows a locally running application to obtain root privileges. Apple's advisory states the issue was addressed with improved checks, indicating that a privileged code path failed to properly validate a caller, argument, or state before performing a sensitive operation. Exploitation requires local access and low privileges, but no user interaction. The vulnerability impacts confidentiality, integrity, and availability, since a root-level compromise removes all operating system trust boundaries above the kernel.

Root Cause

The root cause is improper access control in a macOS system component. Apple's remediation notes point to missing or insufficient validation checks that allowed a lower-privileged process to invoke functionality reserved for higher-privileged contexts. This class of flaw typically appears in setuid binaries, XPC services, privileged helper tools, or entitlement-gated system daemons, where the checks that separate user and root operations are inadequate.

Attack Vector

An attacker must first execute code on the target macOS host, typically by convincing the user to run a malicious application or by chaining this bug with an initial access vulnerability such as a browser or document exploit. Once the malicious process is running under a standard user account, it invokes the vulnerable interface to trigger the flawed check and execute code with root privileges. Because no user interaction is required at the escalation stage, the exploit chain can complete silently after the initial payload runs.

No public proof-of-concept code is currently associated with CVE-2026-64712. Refer to the Apple Security Advisory #149035, Apple Security Advisory #149042, and Apple Security Advisory #149043 for authoritative technical details.

Detection Methods for CVE-2026-64712

Indicators of Compromise

Unexpected processes running as root that were spawned by a standard user session or user-writable path such as /Users/, /tmp/, or ~/Library/.
New or modified LaunchDaemons in /Library/LaunchDaemons/ or /System/Library/LaunchDaemons/ created shortly after an unprivileged application launch.
Anomalous invocations of privileged helper tools in /Library/PrivilegedHelperTools/ from untrusted parent processes.

Detection Strategies

Monitor process ancestry for user-space applications spawning child processes with an effective UID of 0.
Alert on unsigned or ad-hoc signed binaries that acquire root privileges or write to protected system paths.
Correlate Endpoint Security Framework events (ES_EVENT_TYPE_NOTIFY_EXEC, ES_EVENT_TYPE_NOTIFY_SETUID) with subsequent writes to persistence locations.

Monitoring Recommendations

Enable Unified Log collection and forward authd, sudo, and com.apple.xpc events to a central analytics platform.
Track installation of new privileged helper tools and changes to system-managed property lists.
Baseline the set of binaries that legitimately run as root and alert on deviations.

How to Mitigate CVE-2026-64712

Immediate Actions Required

Upgrade macOS hosts to Golden Gate 27, Sequoia 15.8, or Tahoe 26.7, whichever matches the deployed major release.
Inventory endpoints running unsupported macOS versions and prioritize them for remediation.
Restrict installation of untrusted applications through Gatekeeper policy and endpoint management controls.

Patch Information

Apple has released fixes in macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7. Apply the update via System Settings > General > Software Update, or push the update through your MDM. Full details are available in Apple Security Advisory #149035, Apple Security Advisory #149042, and Apple Security Advisory #149043.

Workarounds

No vendor-supplied workaround exists; patching is the only supported remediation.
Reduce risk by removing local administrator rights from standard users and restricting execution of unsigned binaries.
Enforce application allowlisting and require notarized applications through Gatekeeper until patches are deployed.

bash

# Verify current macOS build and trigger update check
sw_vers
sudo softwareupdate --list
sudo softwareupdate --install --all --restart