CVE-2025-43281 Overview
CVE-2025-43281 is a local privilege escalation vulnerability in Apple macOS caused by an authentication weakness. Apple addressed the issue with improved authentication in macOS Sequoia 15.6. A local attacker with limited privileges on an affected system can leverage the flaw to elevate their privileges. The weakness is categorized under [CWE-287] (Improper Authentication).
Critical Impact
A local, authenticated attacker can escalate privileges on unpatched macOS systems, potentially reaching administrative or root-level access with full confidentiality, integrity, and availability impact.
Affected Products
- Apple macOS versions prior to macOS Sequoia 15.6
- Systems identified by CPE cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
- macOS endpoints without the July 2025 security update applied
Discovery Timeline
- 2025-10-15 - CVE-2025-43281 published to the National Vulnerability Database (NVD)
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-43281
Vulnerability Analysis
CVE-2025-43281 is an improper authentication issue in macOS. Apple's advisory states that the flaw allowed a local attacker to elevate their privileges, and that the fix involved strengthened authentication checks. The vulnerability requires local access and low-level privileges, meaning an attacker must already be able to execute code on the target system as a standard user or through a compromised process.
Successful exploitation results in a full compromise of the affected host. An attacker can read protected data, modify system state, and disrupt availability, gaining capabilities equivalent to an elevated account. Because the CWE mapping is [CWE-287], the underlying defect is a failure to correctly verify the identity or authorization of a caller before granting access to a privileged operation.
Apple has not disclosed the specific component within macOS affected by the issue in the public advisory, referring only to the general category of authentication. There is no public exploit code available, and the vulnerability is not listed on the CISA Known Exploited Vulnerabilities catalog.
Root Cause
The root cause is an authentication check that could be bypassed or satisfied without valid credentials. Apple's remediation description states the issue was addressed with improved authentication, indicating that the original check either omitted a required validation step or accepted attacker-controllable input as proof of identity.
Attack Vector
The attack vector is local. An attacker must have code execution on the target macOS system with at least standard user privileges. No user interaction is required to trigger the vulnerability once local access is established. The attacker then interacts with the vulnerable authentication surface to obtain elevated privileges on the same host.
No verified proof-of-concept code has been published. Refer to the Apple Security Advisory for the official vendor description.
Detection Methods for CVE-2025-43281
Indicators of Compromise
- Unexpected privilege transitions in macOS Unified Logs where a standard user process spawns child processes running as root or another privileged account.
- New or modified LaunchDaemons, LaunchAgents, or configuration profiles created shortly after suspicious authentication events.
- Unusual use of sudo, authorization APIs, or XPC service calls from processes that do not normally require elevation.
Detection Strategies
- Monitor Endpoint Security Framework (ESF) events for ES_EVENT_TYPE_NOTIFY_EXEC transitions that indicate privilege changes not tied to legitimate administrative workflows.
- Baseline normal parent-child process relationships on managed Macs and alert on deviations, particularly non-admin users spawning setuid or root processes.
- Correlate macOS os_log authentication subsystem entries with process execution telemetry to surface authentication anomalies preceding privileged actions.
Monitoring Recommendations
- Ingest macOS endpoint telemetry (process, authentication, and file events) into a centralized detection platform and retain logs long enough to support retrospective hunts.
- Track macOS build versions across the fleet and alert on any endpoint running a version older than macOS Sequoia 15.6.
- Review authorization database (/etc/authorization and related plist rules) for unauthorized modifications that could indicate abuse of authentication weaknesses.
How to Mitigate CVE-2025-43281
Immediate Actions Required
- Update all affected Macs to macOS Sequoia 15.6 or later using Software Update or your mobile device management (MDM) solution.
- Inventory endpoints still running vulnerable macOS builds and prioritize patching systems used by administrators or developers with elevated access.
- Restrict local access on shared or multi-user macOS systems until patching is complete.
Patch Information
Apple fixed CVE-2025-43281 in macOS Sequoia 15.6. The vendor states the issue was addressed with improved authentication. Full details are available in the Apple Security Advisory.
Workarounds
- No official workaround has been published by Apple. Applying the macOS Sequoia 15.6 update is the required remediation.
- Limit which users can log in locally or interactively on macOS endpoints, and enforce least privilege for standard accounts.
- Enforce MDM configuration profiles that require automatic installation of macOS security updates within a defined window.
# Verify macOS build meets or exceeds the patched version
sw_vers -productVersion
# Trigger available software updates from the command line
sudo softwareupdate -i -a --restart
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
