CVE-2025-43539
📋 TL;DR
A memory corruption vulnerability in Apple operating systems allows attackers to execute arbitrary code by processing a malicious file. This affects users running vulnerable versions of iOS, iPadOS, macOS, watchOS, tvOS, and visionOS. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- iOS
- iPadOS
- macOS
- watchOS
- tvOS
- visionOS
📦 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 →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
Remote code execution leading to full system compromise, data theft, and persistent backdoor installation.
Likely Case
Application crash or limited code execution in the context of the vulnerable application.
If Mitigated
No impact if patched; limited impact if proper file processing restrictions are in place.
🎯 Exploit Status
Exploitation requires user interaction to process a malicious file; no public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: watchOS 26.2, macOS Sonoma 14.8.3, iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2, macOS Sequoia 15.7.3, visionOS 26.2, tvOS 26.2
Vendor Advisory: https://support.apple.com/en-us/125884
Restart Required: Yes
Instructions:
1. Open Settings app. 2. Navigate to General > Software Update. 3. Download and install the latest available update. 4. Restart the device when prompted.
🔧 Temporary Workarounds
Restrict file processing
allLimit file processing to trusted sources only and avoid opening files from unknown or untrusted sources.
🧯 If You Can't Patch
- Implement application whitelisting to restrict execution of vulnerable applications.
- Use network segmentation to isolate vulnerable systems from critical assets.
🔍 How to Verify
Check if Vulnerable:
Check the operating system version against the affected versions listed in the vendor advisory.Check Version:
On macOS: sw_vers -productVersion; On iOS/iPadOS: Settings > General > About > VersionVerify Fix Applied:
Verify the installed version matches or exceeds the patched versions specified by Apple.📡 Detection & Monitoring
Log Indicators:
- Application crashes related to file processing
- Unexpected process execution from file handling applications
Network Indicators:
- Unusual outbound connections from file processing applications
SIEM Query:
source="apple_system_logs" AND (event="crash" OR event="process_execution") AND process_name IN ("Preview", "Finder", "Safari")🔗 References
- https://support.apple.com/en-us/125884
- https://support.apple.com/en-us/125885
- https://support.apple.com/en-us/125886
- https://support.apple.com/en-us/125887
- https://support.apple.com/en-us/125888
- https://support.apple.com/en-us/125889
- https://support.apple.com/en-us/125890
- https://support.apple.com/en-us/125891
