CVE-2025-43347
📋 TL;DR
An input validation vulnerability in Apple operating systems allows attackers to execute arbitrary code or cause denial of service by sending specially crafted input. This affects users of visionOS, tvOS, iOS, iPadOS, and watchOS before version 26.
💻 Affected Systems
- visionOS
- tvOS
- iOS
- iPadOS
- watchOS
📦 What is this software?
Ipados by Apple
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 →Tvos by Apple
Watchos by Apple
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or device takeover
Likely Case
Application crash or denial of service affecting system stability
If Mitigated
Limited impact with proper input sanitization and network segmentation
🎯 Exploit Status
CVSS 9.8 suggests critical severity with network attack vector and no authentication required
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: visionOS 26, tvOS 26, iOS 26, iPadOS 26, watchOS 26
Vendor Advisory: https://support.apple.com/en-us/125108
Restart Required: Yes
Instructions:
1. Go to Settings > General > Software Update. 2. Download and install the latest OS update. 3. Restart device after installation completes.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected devices from untrusted networks
Input Validation
allImplement strict input validation in applications using affected APIs
🧯 If You Can't Patch
- Disable unnecessary services and network exposure
- Implement strict network access controls and monitoring
🔍 How to Verify
Check if Vulnerable:
Check OS version in Settings > General > About > Software VersionCheck Version:
Not applicable - check via device settings UIVerify Fix Applied:
Verify OS version is 26 or higher in Settings > General > About📡 Detection & Monitoring
Log Indicators:
- Unexpected application crashes
- Memory corruption errors
- Unusual process creation
Network Indicators:
- Unusual network traffic to device services
- Malformed input patterns
SIEM Query:
source="apple-device-logs" AND (event_type="crash" OR event_type="memory_error")🔗 References
- https://support.apple.com/en-us/125108
- https://support.apple.com/en-us/125114
- https://support.apple.com/en-us/125115
- https://support.apple.com/en-us/125116
- http://seclists.org/fulldisclosure/2025/Sep/49
- http://seclists.org/fulldisclosure/2025/Sep/53
- http://seclists.org/fulldisclosure/2025/Sep/56
- http://seclists.org/fulldisclosure/2025/Sep/57
- http://seclists.org/fulldisclosure/2025/Sep/58
