{"id":"CVE-2025-53787","aliases":["EUVD-2025-23955","GHSA-77gm-c93f-mhj7"],"status":"published","title":"Microsoft 365 Copilot BizChat Information Disclosure Vulnerability","description":"Microsoft 365 Copilot BizChat Information Disclosure Vulnerability","severity":{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00799,"percentile":0.56852,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-77"],"published":"2025-08-07T21:01:04Z","modified":"2026-06-17T09:38:53Z","products":[{"vendor":"microsoft","product":"365_copilot_chat"},{"vendor":"microsoft","product":"microsoft 365 copilot's business chat"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53787","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-53787"},{"url":"https://github.com/advisories/GHSA-77gm-c93f-mhj7"}],"sources":{"cve":[{"id":"CVE-2025-53787","title":"Microsoft 365 Copilot BizChat Information Disclosure Vulnerability","description":"Microsoft 365 Copilot BizChat Information Disclosure Vulnerability","status":"published","published":"2025-08-07T21:01:04.272Z","modified":"2026-02-26T17:49:48.272Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-77"],"updated_at":"2026-11-02T14:32:49.180768Z"}],"euvd":[{"id":"EUVD-2025-23955","description":"Microsoft 365 Copilot BizChat Information Disclosure Vulnerability","status":"published","published":"2025-08-07T21:01:04Z","modified":"2026-02-26T17:49:48Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-02T19:48:19.878708Z"}],"ghsa":[{"id":"GHSA-77gm-c93f-mhj7","title":"Microsoft 365 Copilot BizChat Information Disclosure Vulnerability","description":"Microsoft 365 Copilot BizChat Information Disclosure Vulnerability","status":"published","published":"2025-08-07T21:31:08Z","modified":"2025-08-07T21:31:15Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"high"}],"cwes":["CWE-77"],"updated_at":"2026-11-02T15:03:12.931908Z"}],"nvd":[{"id":"CVE-2025-53787","description":"Microsoft 365 Copilot BizChat Information Disclosure Vulnerability","status":"published","published":"2025-08-07T21:15:28.427Z","modified":"2026-06-17T09:38:53.207Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"high","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-77"],"updated_at":"2026-11-02T14:11:22.319351Z"}]}}