CVE-2025-20956
📋 TL;DR
This vulnerability allows physical attackers to access developer settings on Galaxy Watch devices due to improper export of Android application components in the Settings app. It affects Galaxy Watch devices running software versions prior to the May 2025 security update. The attack requires physical access to the device.
💻 Affected Systems
- Samsung Galaxy Watch
📦 What is this software?
Wear Os by Samsung
⚠️ Risk & Real-World Impact
Worst Case
Physical attacker gains unauthorized access to developer settings, potentially enabling debugging features, modifying system behavior, or accessing restricted configuration options that could lead to further exploitation.
Likely Case
Physical attacker accesses developer settings to enable debugging features or modify device behavior, but cannot escalate privileges beyond what the Settings app normally provides.
If Mitigated
With proper physical security controls, the risk is minimal as the vulnerability requires direct physical access to the device.
🎯 Exploit Status
Exploitation requires physical access to the device. The vulnerability involves improper component export in the Settings application.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: SMR May-2025 Release 1
Vendor Advisory: https://security.samsungmobile.com/securityUpdate.smsb?year=2025&month=05
Restart Required: Yes
Instructions:
1. Open Galaxy Wearable app on paired smartphone. 2. Go to Watch settings > Watch software update. 3. Download and install the May 2025 security update. 4. Restart the watch after installation completes.
🔧 Temporary Workarounds
Enable device lock
allSet up a secure lock screen (PIN, pattern, or password) to prevent unauthorized physical access to the device.
Disable developer options
allIf developer options are enabled, disable them to reduce attack surface.
🧯 If You Can't Patch
- Implement strict physical security controls for Galaxy Watch devices
- Enable device encryption and strong authentication methods
🔍 How to Verify
Check if Vulnerable:
Check watch software version in Settings > About watch > Software information. If version is older than SMR May-2025 Release 1, device is vulnerable.Check Version:
Settings > About watch > Software information > Software versionVerify Fix Applied:
After updating, verify software version shows SMR May-2025 Release 1 or later in Settings > About watch > Software information.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to developer settings
- Unexpected changes to developer options
Network Indicators:
- None - this is a local physical access vulnerability
SIEM Query:
Not applicable - physical access vulnerability