{"id":"CVE-2026-24307","aliases":["EUVD-2026-4497","GHSA-5wf5-mwm8-68x4"],"status":"published","title":"M365 Copilot Information Disclosure Vulnerability","description":"Improper validation of specified type of input in M365 Copilot allows an unauthorized attacker to disclose information over a network.","severity":{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00909,"percentile":0.60257,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1287"],"published":"2026-01-22T22:47:36Z","modified":"2026-07-30T20:47:32Z","products":[{"vendor":"microsoft","product":"365_copilot"},{"vendor":"microsoft","product":"microsoft 365 copilot"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-24307","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-24307"},{"url":"https://github.com/advisories/GHSA-5wf5-mwm8-68x4"}],"sources":{"cve":[{"id":"CVE-2026-24307","title":"M365 Copilot Information Disclosure Vulnerability","description":"Improper validation of specified type of input in M365 Copilot allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-01-22T22:47:36.934Z","modified":"2026-07-30T20:47:32.691Z","cvss":[{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"critical","assessor":"cna"}],"cwes":["CWE-1287"],"updated_at":"2026-11-02T14:19:50.24628Z"}],"euvd":[{"id":"EUVD-2026-4497","description":"Improper validation of specified type of input in M365 Copilot allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-01-22T22:47:36Z","modified":"2026-07-30T20:47:32Z","cvss":[{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"critical"}],"updated_at":"2026-11-02T18:02:26.773248Z"}],"ghsa":[{"id":"GHSA-5wf5-mwm8-68x4","title":"Improper validation of specified type of input in M365 Copilot allows an unauthorized attacker to...","description":"Improper validation of specified type of input in M365 Copilot allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-01-23T00:31:18Z","modified":"2026-01-23T00:31:24Z","cvss":[{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-1287"],"updated_at":"2026-11-02T15:05:52.452073Z"}],"nvd":[{"id":"CVE-2026-24307","description":"Improper validation of specified type of input in M365 Copilot allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-01-22T23:15:59.003Z","modified":"2026-06-17T10:22:52.457Z","cvss":[{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","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-1287"],"updated_at":"2026-11-02T14:12:04.423757Z"}]}}