CVE-2025-43404
📋 TL;DR
A sandbox escape vulnerability in macOS allows malicious applications to bypass intended restrictions and access sensitive user data. This affects macOS systems running versions prior to Tahoe 26.1. The vulnerability stems from insufficient sandbox permissions that apps can exploit.
💻 Affected Systems
- macOS
📦 What is this software?
Macos by Apple
macOS is Apple's desktop and laptop operating system powering Mac computers used by millions of professionals, developers, creative professionals, and enterprise users worldwide. Built on a Unix foundation with the Darwin kernel and modern Cocoa frameworks, macOS delivers a seamless ecosystem integr...
Learn more about Macos →⚠️ Risk & Real-World Impact
Worst Case
Malicious app gains unauthorized access to sensitive user data including documents, credentials, or personal information stored in sandboxed areas.
Likely Case
Malicious app accesses limited user data from improperly restricted sandbox areas, potentially exposing some personal information.
If Mitigated
With proper app vetting and security controls, impact is minimal as legitimate apps shouldn't exploit this.
🎯 Exploit Status
Requires user to install/run malicious app. No public exploit details available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Tahoe 26.1
Vendor Advisory: https://support.apple.com/en-us/125634
Restart Required: Yes
Instructions:
1. Open System Settings 2. Go to General > Software Update 3. Install macOS Tahoe 26.1 update 4. Restart when prompted
🔧 Temporary Workarounds
Restrict App Installation Sources
macOSOnly allow app installations from App Store and identified developers
System Settings > Privacy & Security > Allow apps downloaded from: App Store
🧯 If You Can't Patch
- Implement application allowlisting to restrict which apps can run
- Use endpoint detection and response (EDR) to monitor for suspicious app behavior
🔍 How to Verify
Check if Vulnerable:
Check macOS version in System Settings > General > About. If version is earlier than Tahoe 26.1, system is vulnerable.Check Version:
sw_versVerify Fix Applied:
Verify macOS version shows Tahoe 26.1 or later in System Settings > General > About.📡 Detection & Monitoring
Log Indicators:
- Unusual sandbox access attempts in system logs
- Apps accessing files outside their designated sandbox
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
source="macos_system_logs" AND (event="sandbox_violation" OR process_access="unauthorized")