{
 "id": "CVE-2026-85887",
 "description": "Incorrect permission assignment for critical resource in M365 Copilot allows an authorized attacker to disclose information over a network.",
 "published": "2026-09-18",
 "last_modified": "2026-09-28",
 "vuln_status": "Analyzed",
 "cna": "secure@microsoft.com",
 "cvss": {
  "version": "3.1",
  "score": 7.7,
  "severity": "HIGH",
  "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
  "source": "secure@microsoft.com"
 },
 "cwe": [
  "CWE-732"
 ],
 "products": [
  {
   "vendor": "microsoft",
   "product": "365_copilot",
   "versions_affected": null,
   "fixed_in": null,
   "product_id": "m365-copilot"
  }
 ],
 "category": "product",
 "surface": [
  "exfiltration"
 ],
 "kev": null,
 "fix": {
  "status": "unknown",
  "version": null,
  "url": null
 },
 "references": [
  {
   "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85887",
   "source": "secure@microsoft.com",
   "tags": [
    "Vendor Advisory"
   ]
  }
 ],
 "related_agents": [
  "microsoft-microsoft-365-copilot-for-government"
 ],
 "related_incidents": [],
 "match": {
  "tests": [
   "A:cpe"
  ],
  "terms": [
   "m365-copilot:microsoft:365_copilot"
  ]
 },
 "status": "candidate",
 "note": null,
 "reviewer": null,
 "checked_on": null,
 "retrieved_on": "2026-10-25"
}