CVE-2026-20615
📋 TL;DR
A path validation vulnerability in Apple operating systems allows malicious applications to gain root privileges through improper path handling. This affects iOS, iPadOS, macOS, and visionOS users running vulnerable versions. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- iOS
- iPadOS
- macOS
- visionOS
📦 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 →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
Complete system takeover with root access, allowing installation of persistent malware, data exfiltration, and lateral movement across networks.
Likely Case
Local privilege escalation where a malicious app gains root privileges to access sensitive data, modify system files, or install additional payloads.
If Mitigated
Limited impact if proper application sandboxing and least privilege principles are enforced, though root access still poses significant risk.
🎯 Exploit Status
Requires local application execution. Path traversal/validation flaws typically require specific conditions to exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: iOS 26.3, iPadOS 26.3, macOS Tahoe 26.3, macOS Sonoma 14.8.4, visionOS 26.3
Vendor Advisory: https://support.apple.com/en-us/126346
Restart Required: No
Instructions:
1. Open Settings > General > Software Update. 2. Download and install the latest update. 3. For macOS, open System Settings > General > Software Update.
🔧 Temporary Workarounds
Application Restriction
allRestrict installation of untrusted applications through MDM or parental controls
🧯 If You Can't Patch
- Implement strict application allowlisting to prevent execution of untrusted applications
- Enforce network segmentation to limit lateral movement if exploitation occurs
🔍 How to Verify
Check if Vulnerable:
Check current OS version against affected versions listCheck Version:
iOS/iPadOS: Settings > General > About > Version. macOS: System Settings > General > About > macOS version.Verify Fix Applied:
Verify OS version matches or exceeds patched versions📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege escalation events
- Process execution with unexpected parent/child relationships
- System file modifications by non-system processes
Network Indicators:
- Unusual outbound connections from system processes
- DNS queries to suspicious domains from elevated processes
SIEM Query:
process where parent_process_name contains 'App' and process_name contains 'sudo' or 'su'