{"id":"CVE-2026-85887","aliases":["EUVD-2026-82600","GHSA-g3r4-5f4w-4vh4"],"status":"published","title":"M365 Copilot Information Disclosure Vulnerability","description":"Incorrect permission assignment for critical resource in M365 Copilot allows an authorized attacker to disclose information over a network.","severity":{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.0084,"percentile":0.58297,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-732"],"published":"2026-09-17T23:04:48Z","modified":"2026-11-10T21:38:39Z","products":[{"vendor":"microsoft","product":"365_copilot"},{"vendor":"microsoft","product":"microsoft 365 copilot"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85887","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-85887"},{"url":"https://github.com/advisories/GHSA-g3r4-5f4w-4vh4"}],"sources":{"cve":[{"id":"CVE-2026-85887","title":"M365 Copilot Information Disclosure Vulnerability","description":"Incorrect permission assignment for critical resource in M365 Copilot allows an authorized attacker to disclose information over a network.","status":"published","published":"2026-09-17T23:04:48.423Z","modified":"2026-11-10T21:38:39.295Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-732"],"updated_at":"2026-11-10T22:48:54.515847Z"}],"euvd":[{"id":"EUVD-2026-82600","description":"Incorrect permission assignment for critical resource in M365 Copilot allows an authorized attacker to disclose information over a network.","status":"published","published":"2026-09-17T23:04:48Z","modified":"2026-11-10T21:38:39Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T23:24:18.784503Z"}],"ghsa":[{"id":"GHSA-g3r4-5f4w-4vh4","title":"Incorrect permission assignment for critical resource in M365 Copilot allows an authorized...","description":"Incorrect permission assignment for critical resource in M365 Copilot allows an authorized attacker to disclose information over a network.","status":"published","published":"2026-09-18T00:31:11Z","modified":"2026-09-18T00:31:20Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-732"],"updated_at":"2026-11-02T15:12:08.779152Z"}],"nvd":[{"id":"CVE-2026-85887","description":"Incorrect permission assignment for critical resource in M365 Copilot allows an authorized attacker to disclose information over a network.","status":"published","published":"2026-09-18T00:17:47.92Z","modified":"2026-09-28T18:37:31.143Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-732"],"updated_at":"2026-11-02T14:12:49.70655Z"}]}}