CVE-2025-20935
📋 TL;DR
This vulnerability in Samsung's ClipboardService allows local attackers to access files with system privileges when user interaction occurs. It affects Samsung devices running Android prior to the April 2025 security update. Attackers need physical or remote access to the device to trigger this privilege escalation.
💻 Affected Systems
- Samsung Android devices
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Local attacker gains system-level file access, potentially reading sensitive system files, user data, or configuration files that could lead to further system compromise.
Likely Case
Local attacker accesses user clipboard data or limited system files, potentially exposing sensitive information but not gaining full system control.
If Mitigated
With proper security updates applied, no impact as the vulnerability is patched.
🎯 Exploit Status
Requires local access and user interaction. No public exploit details available from Samsung advisory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: SMR Apr-2025 Release 1
Vendor Advisory: https://security.samsungmobile.com/securityUpdate.smsb?year=2025&month=04
Restart Required: Yes
Instructions:
1. Go to Settings > Software update > Download and install. 2. Apply the April 2025 security update. 3. Restart device when prompted.
🔧 Temporary Workarounds
Disable clipboard access for untrusted apps
androidRestrict which apps can access clipboard to reduce attack surface
Limit physical device access
allImplement device security policies to prevent unauthorized physical access
🧯 If You Can't Patch
- Implement strict physical security controls for devices
- Use mobile device management (MDM) to restrict app installations and monitor for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Software information. If patch level is earlier than April 1, 2025, device is vulnerable.Check Version:
Settings command not available via ADB. Use Settings UI: Settings > About phone > Software information > Android security patch levelVerify Fix Applied:
Verify security patch level shows 'April 1, 2025' or later in Settings > About phone > Software information.📡 Detection & Monitoring
Log Indicators:
- Unusual clipboard access patterns
- Permission escalation attempts in system logs
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
Not applicable for typical mobile device deployments