{"id":"CVE-2026-54130","aliases":["EUVD-2026-37946","GHSA-9cqp-hgpj-49wr"],"status":"published","title":"M365 Copilot Information Disclosure Vulnerability","description":"Missing authentication for critical function in M365 Copilot allows an unauthorized attacker to disclose information over a network.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01084,"percentile":0.65662,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-306"],"published":"2026-06-18T21:42:39Z","modified":"2026-11-03T22:13:27Z","products":[{"vendor":"microsoft","product":"365_copilot"},{"vendor":"microsoft","product":"microsoft 365 copilot"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54130","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54130"},{"url":"https://github.com/advisories/GHSA-9cqp-hgpj-49wr"}],"sources":{"cve":[{"id":"CVE-2026-54130","title":"M365 Copilot Information Disclosure Vulnerability","description":"Missing authentication for critical function in M365 Copilot allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-06-18T21:42:39.358Z","modified":"2026-11-10T23:23:27.766Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical","assessor":"cna"}],"cwes":["CWE-306"],"updated_at":"2026-11-11T00:50:10.599584Z"}],"euvd":[{"id":"EUVD-2026-37946","description":"Missing authentication for critical function in M365 Copilot allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-06-18T21:42:39Z","modified":"2026-11-10T23:23:27Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical"}],"updated_at":"2026-11-11T00:24:46.475072Z"}],"ghsa":[{"id":"GHSA-9cqp-hgpj-49wr","title":"Missing authentication for critical function in M365 Copilot allows an unauthorized attacker to...","description":"Missing authentication for critical function in M365 Copilot allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-06-19T00:31:37Z","modified":"2026-06-19T00:31:41Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T15:08:54.452189Z"}],"nvd":[{"id":"CVE-2026-54130","description":"Missing authentication for critical function in M365 Copilot allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-06-18T22:16:32.223Z","modified":"2026-11-03T23:17:47.957Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-306"],"updated_at":"2026-11-04T01:48:33.119303Z"}]}}