CVE-2026-20986
📋 TL;DR
A path traversal vulnerability in Samsung Members app allows local attackers to overwrite arbitrary files within the app's data directory. This affects users of Samsung Members Chinese version prior to 15.5.05.4. Attackers must have local access to the device to exploit this vulnerability.
💻 Affected Systems
- Samsung Members
📦 What is this software?
Members by Samsung
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of Samsung Members app data, potential privilege escalation if combined with other vulnerabilities, or denial of service by corrupting critical app files.
Likely Case
Local attackers overwrite configuration files or user data within the Samsung Members app, potentially disrupting app functionality or accessing sensitive information stored by the app.
If Mitigated
Minimal impact with proper file permission controls and app sandboxing preventing traversal outside the app's designated directories.
🎯 Exploit Status
Path traversal vulnerabilities typically have low exploitation complexity but require local access to the device.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 15.5.05.4 and later
Vendor Advisory: https://security.samsungmobile.com/serviceWeb.smsb?year=2026&month=02
Restart Required: No
Instructions:
1. Open Samsung Members app. 2. Go to Settings > About > Check for updates. 3. Install version 15.5.05.4 or later. 4. Alternatively, update through Samsung Galaxy Store.
🔧 Temporary Workarounds
Disable Samsung Members app
androidTemporarily disable the vulnerable app until patched
adb shell pm disable-user --user 0 com.samsung.android.voc
Restrict app permissions
androidRemove unnecessary permissions from Samsung Members app
adb shell pm revoke com.samsung.android.voc android.permission.WRITE_EXTERNAL_STORAGE
🧯 If You Can't Patch
- Implement strict file permission controls on device
- Monitor for unusual file modification patterns in Samsung Members data directory
🔍 How to Verify
Check if Vulnerable:
Check Samsung Members app version in device settings > Apps > Samsung Members > App infoCheck Version:
adb shell dumpsys package com.samsung.android.voc | grep versionNameVerify Fix Applied:
Verify app version is 15.5.05.4 or higher after update📡 Detection & Monitoring
Log Indicators:
- Unusual file write operations in /data/data/com.samsung.android.voc/ directory
- Path traversal patterns in app logs
Network Indicators:
- No network indicators - local vulnerability only
SIEM Query:
No applicable network SIEM query - monitor local file system changes instead