CVE-2025-21038 – This vulnerability in Samsung's S Assistant all... (How to Fix)

Q: What is the severity of CVE-2025-21038?

CVE-2025-21038 has a CVSS score of 5.1 (MEDIUM). This vulnerability in Samsung's S Assistant allows local attackers to modify itinerary information due to improper intent verification. It affects Samsung devices running S Assistant versions prior to 9.3.2. Attackers must have local access to the device to exploit this flaw.

📋 TL;DR

This vulnerability in Samsung's S Assistant allows local attackers to modify itinerary information due to improper intent verification. It affects Samsung devices running S Assistant versions prior to 9.3.2. Attackers must have local access to the device to exploit this flaw.

💻 Affected Systems

Products:

Samsung S Assistant

Versions: All versions prior to 9.3.2

Operating Systems: Android (Samsung devices)

Default Config Vulnerable: ⚠️ Yes

Notes: Only affects Samsung devices with S Assistant installed. Requires local access to the device.

📦 What is this software?

Sassistant by Samsung

View all CVEs affecting Sassistant →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Malicious local user could modify or delete important itinerary data, potentially causing travel disruptions, missed appointments, or financial losses if itinerary includes booking information.

🟠

Likely Case

Local attacker with basic access could tamper with itinerary entries, causing inconvenience and potential minor disruptions to scheduled activities.

🟢

If Mitigated

With proper access controls and updated software, only authorized users can modify itinerary data, maintaining data integrity.

🌐 Internet-Facing: LOW - This is a local vulnerability requiring physical or local access to the device.

🏢 Internal Only: MEDIUM - In environments with shared devices or insufficient access controls, malicious insiders could exploit this to tamper with itinerary data.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Requires local access to device and knowledge of intent manipulation. No public exploit code available at this time.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 9.3.2 or later

Vendor Advisory: https://security.samsungmobile.com/serviceWeb.smsb?year=2025&month=09

Restart Required: No

Instructions:

1. Open Galaxy Store on Samsung device. 2. Search for 'S Assistant'. 3. Update to version 9.3.2 or later. 4. Alternatively, enable auto-updates for apps in Galaxy Store settings.

🔧 Temporary Workarounds

Disable S Assistant

Android

Temporarily disable the vulnerable component until patched

Go to Settings > Apps > S Assistant > Disable

Restrict Local Access

all

Implement device access controls to prevent unauthorized local access

🧯 If You Can't Patch

Implement strict device access controls and monitoring
Disable S Assistant functionality or restrict its permissions

🔍 How to Verify

Check if Vulnerable:

Check S Assistant version in Galaxy Store or device app settings. If version is below 9.3.2, device is vulnerable.

Check Version:

No CLI command. Check via: Settings > Apps > S Assistant > App info

Verify Fix Applied:

Confirm S Assistant version is 9.3.2 or higher in app settings.

📡 Detection & Monitoring

Log Indicators:

Unusual intent broadcasts to SamsungExceptionalBroadcastReceiver
Unexpected itinerary modifications

Network Indicators:

None - this is a local vulnerability

SIEM Query:

Not applicable for local app vulnerabilities without specific logging

📊 Metadata

CVE ID: CVE-2025-21038

CVSS v3 Score: 5.1 (MEDIUM)

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

EPSS Score: 0.02% exploit probability (4th percentile)

Published: September 3, 2025

Last Updated: September 5, 2025

🔗 References

https://security.samsungmobile.com/serviceWeb.smsb?year=2025&month=09 Vendor Advisory

📤 Share & Export

📄 Export Markdown 📋 Export JSON