CVE-2025-21045
📋 TL;DR
This vulnerability allows local attackers to access sensitive information stored insecurely on Galaxy Watch devices. It affects Galaxy Watch users who haven't applied the October 2025 security update. The issue requires physical access or local execution on the device.
💻 Affected Systems
- Samsung Galaxy Watch
📦 What is this software?
Wear Os by Samsung
⚠️ Risk & Real-World Impact
Worst Case
Local attacker gains access to sensitive user data including personal information, health data, or authentication tokens stored on the device.
Likely Case
Malicious app or user with physical access reads sensitive files that should be protected, potentially exposing personal data.
If Mitigated
With proper access controls and encryption, sensitive data remains protected even if storage location is discovered.
🎯 Exploit Status
Requires local access to device or ability to run malicious code locally. No public exploit details available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: SMR Oct-2025 Release 1
Vendor Advisory: https://security.samsungmobile.com/securityUpdate.smsb?year=2025&month=10
Restart Required: No
Instructions:
1. Open Galaxy Wearable app on paired phone. 2. Go to Watch settings > About watch > Update watch software. 3. Install available updates. 4. Verify update to SMR Oct-2025 Release 1 or later.
🔧 Temporary Workarounds
Enable device encryption
allEnsure device encryption is enabled to protect stored data
Restrict physical access
allKeep watch physically secure and use lock screen protection
🧯 If You Can't Patch
- Enable strong lock screen authentication (PIN/pattern/password)
- Avoid storing highly sensitive data on the watch
🔍 How to Verify
Check if Vulnerable:
Check watch software version in Settings > About watch > Software informationCheck Version:
Not applicable - check via watch settings UIVerify Fix Applied:
Verify software version shows SMR Oct-2025 Release 1 or later📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns in system logs
- Multiple failed access attempts to protected storage
Network Indicators:
- Not applicable - local vulnerability only
SIEM Query:
Not applicable for local device vulnerability