{"id":"CVE-2026-21520","aliases":["EUVD-2026-4504","GHSA-5vx4-v4r5-wrxg"],"status":"published","title":"Copilot Studio Information Disclosure Vulnerability","description":"Exposure of Sensitive Information to an Unauthorized Actor in Copilot Studio allows a unauthenticated attacker to view sensitive information through network attack vector","severity":{"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/E:U/RL:O/RC:C/CR:H/IR:L/AR:L","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01534,"percentile":0.75143,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-77"],"published":"2026-01-22T22:47:33Z","modified":"2026-07-30T20:47:30Z","products":[{"vendor":"microsoft","product":"copilot_studio"},{"vendor":"microsoft","product":"microsoft copilot studio"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21520","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21520"},{"url":"https://github.com/advisories/GHSA-5vx4-v4r5-wrxg"}],"sources":{"cve":[{"id":"CVE-2026-21520","title":"Copilot Studio Information Disclosure Vulnerability","description":"Exposure of Sensitive Information to an Unauthorized Actor in Copilot Studio allows a unauthenticated attacker to view sensitive information through network attack vector","status":"published","published":"2026-01-22T22:47:33.536Z","modified":"2026-07-30T20:47:30.6Z","cvss":[{"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/E:U/RL:O/RC:C/CR:H/IR:L/AR:L","level":"high","assessor":"cna"}],"cwes":["CWE-77"],"updated_at":"2026-11-02T13:41:53.237769Z"}],"euvd":[{"id":"EUVD-2026-4504","description":"Exposure of Sensitive Information to an Unauthorized Actor in Copilot Studio allows a unauthenticated attacker to view sensitive information through network attack vector","status":"published","published":"2026-01-22T22:47:33Z","modified":"2026-07-30T20:47:30Z","cvss":[{"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/E:U/RL:O/RC:C/CR:H/IR:L/AR:L","level":"high"}],"updated_at":"2026-11-02T18:02:26.773248Z"}],"ghsa":[{"id":"GHSA-5vx4-v4r5-wrxg","title":"Exposure of Sensitive Information to an Unauthorized Actor in Copilot Studio allows a...","description":"Exposure of Sensitive Information to an Unauthorized Actor in Copilot Studio allows a unauthenticated attacker to view sensitive information through network attack vector","status":"published","published":"2026-01-23T00:31:17Z","modified":"2026-01-23T00:31:24Z","cvss":[{"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"}],"cwes":["CWE-77"],"updated_at":"2026-11-02T15:05:52.452073Z"}],"nvd":[{"id":"CVE-2026-21520","description":"Exposure of Sensitive Information to an Unauthorized Actor in Copilot Studio allows a unauthenticated attacker to view sensitive information through network attack vector","status":"published","published":"2026-01-22T23:15:57.657Z","modified":"2026-06-17T10:18:46.46Z","cvss":[{"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":"secondary"}],"cwes":["CWE-77"],"updated_at":"2026-11-02T14:12:04.423757Z"}]}}