{"id":"CVE-2026-33102","aliases":["EUVD-2026-25310","GHSA-q6x5-8v4h-crwr"],"status":"published","title":"Microsoft 365 Copilot Elevation of Privilege Vulnerability","description":"Url redirection to untrusted site ('open redirect') in M365 Copilot 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: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":0.00398,"percentile":0.34379,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-601"],"published":"2026-04-23T21:35:48Z","modified":"2026-10-26T21:10:00Z","products":[{"vendor":"microsoft","product":"365_copilot"},{"vendor":"microsoft","product":"microsoft 365 copilot"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33102","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33102"},{"url":"https://github.com/advisories/GHSA-q6x5-8v4h-crwr"}],"sources":{"cve":[{"id":"CVE-2026-33102","title":"Microsoft 365 Copilot Elevation of Privilege Vulnerability","description":"Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privileges over a network.","status":"published","published":"2026-04-23T21:35:48.984Z","modified":"2026-10-15T15:52:08.039Z","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-601"],"updated_at":"2026-11-02T14:20:08.009733Z"}],"euvd":[{"id":"EUVD-2026-25310","description":"Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privileges over a network.","status":"published","published":"2026-04-23T21:35:48Z","modified":"2026-10-15T15:52:08Z","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":"2026-11-02T17:00:13.422137Z"}],"ghsa":[{"id":"GHSA-q6x5-8v4h-crwr","title":"Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized...","description":"Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privileges over a network.","status":"published","published":"2026-04-24T00:31:51Z","modified":"2026-04-24T00:31:58Z","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-601"],"updated_at":"2026-11-02T15:07:37.11234Z"}],"nvd":[{"id":"CVE-2026-33102","description":"Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privileges over a network.","status":"published","published":"2026-04-23T22:16:37.093Z","modified":"2026-10-26T21:10:00.17Z","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"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T14:12:15.867234Z"}]}}