CVE-2025-43388
📋 TL;DR
This CVE describes an injection vulnerability in macOS that allows malicious applications to access sensitive user data. The issue affects macOS systems before version 26.1 (Tahoe) and was addressed through improved input validation.
💻 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
A malicious app could access sensitive user data including personal files, credentials, or other protected information stored on the system.
Likely Case
Malicious applications distributed through unofficial channels could exploit this to steal user data or perform unauthorized actions.
If Mitigated
With proper app vetting and security controls, exploitation risk is significantly reduced as legitimate apps from trusted sources wouldn't exploit this.
🎯 Exploit Status
Exploitation requires a malicious application to be installed and executed on the target system. The injection nature suggests it could be leveraged through various input vectors.
🛠️ 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. Click General 3. Click Software Update 4. Install macOS Tahoe 26.1 update 5. Restart when prompted
🔧 Temporary Workarounds
Restrict Application Installation
macosOnly allow installation of applications from the App Store and identified developers
sudo spctl --master-enable
sudo spctl --enable --label "Developer ID"
Application Sandboxing
macosUse macOS sandboxing features to restrict application access to sensitive data
🧯 If You Can't Patch
- Implement strict application allowlisting policies
- Use endpoint detection and response (EDR) solutions to monitor for suspicious application behavior
🔍 How to Verify
Check if Vulnerable:
Check macOS version: if version is earlier than 26.1, the system is vulnerableCheck Version:
sw_versVerify Fix Applied:
Verify macOS version is 26.1 or later after applying the update📡 Detection & Monitoring
Log Indicators:
- Unusual application behavior accessing protected directories
- Processes attempting to bypass sandbox restrictions
- Applications making unexpected system calls
Network Indicators:
- Unusual outbound data transfers from applications
- Applications making unexpected network connections
SIEM Query:
process_name:* AND (file_access:*/Library/* OR file_access:*/Users/*) AND NOT user:root