{"id":"CVE-2026-80098","aliases":["EUVD-2026-70794","GHSA-r9hf-26xj-x88v"],"status":"published","title":"Copilot Studio Elevation of Privilege Vulnerability","description":"Improper verification of cryptographic signature in Copilot Studio allows an unauthorized attacker to elevate privileges over a network.","severity":{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N/E:U/RL:O/RC:C","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-05","score":0.00488,"percentile":0.42176,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-347"],"published":"2026-09-03T22:59:13Z","modified":"2026-10-31T16:18:07Z","products":[{"vendor":"microsoft","product":"copilot_studio"},{"vendor":"microsoft","product":"microsoft copilot studio"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80098","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80098"},{"url":"https://github.com/advisories/GHSA-r9hf-26xj-x88v"}],"sources":{"cve":[{"id":"CVE-2026-80098","title":"Copilot Studio Elevation of Privilege Vulnerability","description":"Improper verification of cryptographic signature in Copilot Studio allows an unauthorized attacker to elevate privileges over a network.","status":"published","published":"2026-09-03T22:59:13.804Z","modified":"2026-10-31T16:18:07.769Z","cvss":[{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N/E:U/RL:O/RC:C","level":"critical","assessor":"cna"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T13:45:25.313702Z"}],"euvd":[{"id":"EUVD-2026-70794","description":"Improper verification of cryptographic signature in Copilot Studio allows an unauthorized attacker to elevate privileges over a network.","status":"published","published":"2026-09-03T22:59:13Z","modified":"2026-10-31T16:18:07Z","cvss":[{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N/E:U/RL:O/RC:C","level":"critical"}],"updated_at":"2026-11-02T16:58:56.351683Z"}],"ghsa":[{"id":"GHSA-r9hf-26xj-x88v","title":"Improper verification of cryptographic signature in Copilot Studio allows an unauthorized...","description":"Improper verification of cryptographic signature in Copilot Studio allows an unauthorized attacker to elevate privileges over a network.","status":"published","published":"2026-09-04T00:31:07Z","modified":"2026-09-04T00:31:11Z","cvss":[{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N","level":"critical"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T15:11:21.315485Z"}],"nvd":[{"id":"CVE-2026-80098","description":"Improper verification of cryptographic signature in Copilot Studio allows an unauthorized attacker to elevate privileges over a network.","status":"published","published":"2026-09-03T23:17:20.35Z","modified":"2026-09-08T17:53:07.297Z","cvss":[{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N","level":"critical","assessor":"secondary"},{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:12:43.737972Z"}]}}