{"schemaVersion":3,"id":"CVE-2021-21980","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"The vSphere Web Client (FLEX/Flash) contains an unauthorized arbitrary file read vulnerability. A malicious actor with network access to port 443 on vCenter Server may exploit this issue to gain access to sensitive information.","dates":{"published":"2021-11-24T16:32:43.000Z","modified":"2024-08-03T18:30:23.351Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":5,"severity":"medium","vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.04674,"percentile":0.9167,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.04674},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.04601,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.04601,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.04601,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.04674,"percentile":0.9167}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.04674,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.04674,"percentile":0.9167}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"vmware","product":"cloud_foundation","name":"cloud foundation","label":"cloud_foundation","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"3.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"3.0","eol":null,"hubHref":"/vendor/vmware/cloud_foundation"},{"vendor":"vmware","product":"vcenter_server","name":"vCenter Server","label":"vcenter_server","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"6.5","noFixRecorded":false,"fixedIn":null},{"text":"6.5:update_1","noFixRecorded":false,"fixedIn":null},{"text":"6.5:update_1b","noFixRecorded":false,"fixedIn":null},{"text":"6.5:update_1c","noFixRecorded":false,"fixedIn":null},{"text":"6.5:update_1d","noFixRecorded":false,"fixedIn":null},{"text":"6.5:update_1e","noFixRecorded":false,"fixedIn":null},{"text":"6.5:update_1g","noFixRecorded":false,"fixedIn":null},{"text":"6.5:update_2","noFixRecorded":false,"fixedIn":null},{"text":"6.5:update_2b","noFixRecorded":false,"fixedIn":null},{"text":"6.5:update_2c","noFixRecorded":false,"fixedIn":null},{"text":"6.5:update_2d","noFixRecorded":false,"fixedIn":null},{"text":"6.5:update_2g","noFixRecorded":false,"fixedIn":null},{"text":"6.5:update_3","noFixRecorded":false,"fixedIn":null},{"text":"6.5:update_3d","noFixRecorded":false,"fixedIn":null},{"text":"6.5:update_3f","noFixRecorded":false,"fixedIn":null},{"text":"6.5:update_3k","noFixRecorded":false,"fixedIn":null},{"text":"6.5:update_3n","noFixRecorded":false,"fixedIn":null},{"text":"6.5:update_3p","noFixRecorded":false,"fixedIn":null},{"text":"6.5:update_3q","noFixRecorded":false,"fixedIn":null},{"text":"6.7","noFixRecorded":false,"fixedIn":null},{"text":"6.7:update_1","noFixRecorded":false,"fixedIn":null},{"text":"6.7:update_1b","noFixRecorded":false,"fixedIn":null},{"text":"6.7:update_2","noFixRecorded":false,"fixedIn":null},{"text":"6.7:update_2a","noFixRecorded":false,"fixedIn":null},{"text":"6.7:update_2c","noFixRecorded":false,"fixedIn":null},{"text":"6.7:update_3","noFixRecorded":false,"fixedIn":null},{"text":"6.7:update_3a","noFixRecorded":false,"fixedIn":null},{"text":"6.7:update_3b","noFixRecorded":false,"fixedIn":null},{"text":"6.7:update_3f","noFixRecorded":false,"fixedIn":null},{"text":"6.7:update_3g","noFixRecorded":false,"fixedIn":null},{"text":"6.7:update_3j","noFixRecorded":false,"fixedIn":null},{"text":"6.7:update_3l","noFixRecorded":false,"fixedIn":null},{"text":"6.7:update_3m","noFixRecorded":false,"fixedIn":null},{"text":"6.7:update_3n","noFixRecorded":false,"fixedIn":null},{"text":"6.7:update_3o","noFixRecorded":false,"fixedIn":null}],"versionsText":"6.5 | 6.5:update_1 | 6.5:update_1b | 6.5:update_1c | 6.5:update_1d | 6.5:update_1e | 6.5:update_1g | 6.5:update_2 | 6.5:update_2b | 6.5:update_2c | 6.5:update_2d | 6.5:update_2g | 6.5:update_3 | 6.5:update_3d | 6.5:update_3f | 6.5:update_3k | 6.5:update_3n | 6.5:update_3p | 6.5:update_3q | 6.7 | 6.7:update_1 | 6.7:update_1b | 6.7:update_2 | 6.7:update_2a | 6.7:update_2c | 6.7:update_3 | 6.7:update_3a | 6.7:update_3b | 6.7:update_3f | 6.7:update_3g | 6.7:update_3j | 6.7:update_3l | 6.7:update_3m | 6.7:update_3n | 6.7:update_3o","eol":{"isEol":true,"eolDate":"2022-10-15T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"6.5","label":"6.5","eolFrom":"2022-10-15T00:00:00.000Z","isLts":false,"isMaintained":false,"latestVersion":"6.5 U3w"},"product":{"name":"vcenter","label":"VMware vCenter Server","category":"app"}},"hubHref":"/vendor/vmware/vcenter_server"}],"affectedCount":2,"eol":{"hasEol":true,"count":1},"references":[{"url":"https://www.vmware.com/security/advisories/VMSA-2021-0027.html","label":"www.vmware.com/security/advisories/VMSA-2021-0027.html","hostname":"www.vmware.com","tags":["X Refsource MISC","Patch","Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2021-11-24T16:32:43.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-03T18:30:23.351Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":31,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T12:17:34.441Z","stale":false,"partial":false}}