{"id":"CVE-2026-55145","aliases":["EUVD-2026-44226","GHSA-534g-wpcr-fm9q"],"status":"published","title":"Outlook Copilot Tampering Vulnerability","description":"Improper neutralization of special elements used in a command ('command injection') in Outlook Copilot allows an authorized attacker to perform tampering over a network.","severity":{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N/E:P/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00525,"percentile":0.44828,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-77"],"published":"2026-07-14T17:09:09Z","modified":"2026-11-10T22:39:44Z","products":[{"vendor":"microsoft","product":"copilot"},{"vendor":"microsoft","product":"microsoft copilot"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55145","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55145"},{"url":"https://github.com/advisories/GHSA-534g-wpcr-fm9q"}],"sources":{"cve":[{"id":"CVE-2026-55145","title":"Outlook Copilot Tampering Vulnerability","description":"Improper neutralization of special elements used in a command ('command injection') in Outlook Copilot allows an authorized attacker to perform tampering over a network.","status":"published","published":"2026-07-14T17:09:09.269Z","modified":"2026-11-10T22:39:44.058Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N/E:P/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-77"],"updated_at":"2026-11-10T23:49:29.755102Z"}],"euvd":[{"id":"EUVD-2026-44226","description":"Improper neutralization of special elements used in a command ('command injection') in Outlook Copilot allows an authorized attacker to perform tampering over a network.","status":"published","published":"2026-07-14T17:09:09Z","modified":"2026-11-10T22:39:44Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N/E:P/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-11T00:24:47.005432Z"}],"ghsa":[{"id":"GHSA-534g-wpcr-fm9q","title":"Improper neutralization of special elements used in a command ('command injection') in Outlook...","description":"Improper neutralization of special elements used in a command ('command injection') in Outlook Copilot allows an authorized attacker to perform tampering over a network.","status":"published","published":"2026-07-14T18:32:36Z","modified":"2026-07-14T18:32:43Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N","level":"medium"}],"cwes":["CWE-77"],"updated_at":"2026-11-02T15:09:30.715875Z"}],"nvd":[{"id":"CVE-2026-55145","description":"Improper neutralization of special elements used in a command ('command injection') in Outlook Copilot allows an authorized attacker to perform tampering over a network.","status":"published","published":"2026-07-14T18:18:21.52Z","modified":"2026-10-24T21:10:00.13Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-77"],"updated_at":"2026-11-02T14:12:29.489525Z"}]}}