CVE-2025-21060
📋 TL;DR
Samsung Smart Switch versions before 3.7.67.2 store sensitive application backup data in cleartext, allowing local attackers with physical or remote access to read this information. This vulnerability requires user interaction to trigger and affects users who have created backups using the vulnerable software.
💻 Affected Systems
- Samsung Smart Switch
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could extract sensitive application data including credentials, personal information, or authentication tokens from backups, potentially leading to account compromise or identity theft.
Likely Case
Local users or malware on the same system could access backup files containing application data, potentially exposing personal information or configuration details.
If Mitigated
With proper access controls and encryption, the exposed data would remain protected even if stored in cleartext.
🎯 Exploit Status
Exploitation requires local access to the system and user interaction to trigger the vulnerable backup process.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.7.67.2 or later
Vendor Advisory: https://security.samsungmobile.com/serviceWeb.smsb?year=2025&month=10
Restart Required: No
Instructions:
1. Open Samsung Smart Switch. 2. Navigate to Help > Check for Updates. 3. Follow prompts to update to version 3.7.67.2 or later. 4. Verify update completion in About section.
🔧 Temporary Workarounds
Disable automatic backups
allPrevent Smart Switch from automatically creating backups that could expose sensitive data
Secure backup storage location
allApply strict file permissions to backup directories to limit access
Windows: icacls "C:\Users\[username]\AppData\Local\Samsung\SmartSwitchPC" /deny Users:(OI)(CI)F
macOS: chmod 700 ~/Library/Application Support/Samsung/SmartSwitchPC
🧯 If You Can't Patch
- Delete existing Smart Switch backup files and disable backup functionality
- Implement full disk encryption on systems where Smart Switch is installed
🔍 How to Verify
Check if Vulnerable:
Check Smart Switch version in Help > About; versions below 3.7.67.2 are vulnerableCheck Version:
Windows: "C:\Program Files\Samsung\Smart Switch PC\SmartSwitchPC.exe" --version (if available) or check in GUIVerify Fix Applied:
Confirm version is 3.7.67.2 or higher in Help > About section📡 Detection & Monitoring
Log Indicators:
- Access to Smart Switch backup directories by unauthorized users
- File read operations on .sbu or Smart Switch backup files
Network Indicators:
- None - this is a local file system vulnerability
SIEM Query:
EventID=4663 AND ObjectName LIKE "%SmartSwitch%" AND AccessMask=0x1 (Windows file access auditing)