{"id":"CVE-2021-21980","aliases":["EUVD-2021-9151","GHSA-j86w-wm9c-rcfm"],"status":"published","title":"The vSphere Web Client (FLEX/Flash) contains an unauthorized arbitrary file read vulnerability. A...","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.","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","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.04674,"percentile":0.91845,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-200"],"published":"2021-11-24T16:32:43Z","modified":"2026-06-17T03:36:29Z","exploits":[{"source":"pocgithub","id":"Osyanina/westone-CVE-2021-21980-scanner","title":"Osyanina/westone-CVE-2021-21980-scanner","date":"2021-12-03","url":"https://github.com/Osyanina/westone-CVE-2021-21980-scanner"},{"source":"pocgithub","id":"Osyanina/westone-CVE-2022-1388-scanner","title":"Osyanina/westone-CVE-2022-1388-scanner","date":"2022-05-07","url":"https://github.com/Osyanina/westone-CVE-2022-1388-scanner"},{"source":"pocgithub","id":"gui2000guix-ui/cve-2021-21980-mock-server","title":"gui2000guix-ui/cve-2021-21980-mock-server","date":"2025-11-27","url":"https://github.com/gui2000guix-ui/cve-2021-21980-mock-server"},{"source":"pocgithub","id":"gui2000guix-ui/cve-2021-21980-nuclei-poc","title":"gui2000guix-ui/cve-2021-21980-nuclei-poc","date":"2025-11-27","url":"https://github.com/gui2000guix-ui/cve-2021-21980-nuclei-poc"},{"source":"pocgithub","id":"pkxk5pr6m2-web/cve-2021-21980-nuclei-poc","title":"pkxk5pr6m2-web/cve-2021-21980-nuclei-poc","date":"2025-11-27","url":"https://github.com/pkxk5pr6m2-web/cve-2021-21980-nuclei-poc"},{"source":"pocgithub","id":"pratikjojode/vcenter-cve-2021-21980-lab","title":"pratikjojode/vcenter-cve-2021-21980-lab","date":"2025-12-01","url":"https://github.com/pratikjojode/vcenter-cve-2021-21980-lab"}],"products":[{"vendor":"vmware","product":"cloud_foundation"},{"vendor":"vmware","product":"vcenter_server"}],"references":[{"url":"https://www.vmware.com/security/advisories/VMSA-2021-0027.html","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-21980"},{"url":"https://github.com/advisories/GHSA-j86w-wm9c-rcfm"}],"sources":{"cve":[{"id":"CVE-2021-21980","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.","status":"published","published":"2021-11-24T16:32:43Z","modified":"2024-08-03T18:30:23.351Z","updated_at":"2026-11-02T14:33:00.137099Z"}],"euvd":[{"id":"EUVD-2021-9151","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.","status":"published","published":"2021-11-24T16:32:43Z","modified":"2024-08-03T18:30:23Z","updated_at":"2026-11-03T03:25:04.094929Z"}],"ghsa":[{"id":"GHSA-j86w-wm9c-rcfm","title":"The vSphere Web Client (FLEX/Flash) contains an unauthorized arbitrary file read vulnerability. A...","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.","status":"published","published":"2021-11-25T00:00:36Z","modified":"2023-01-27T05:01:12Z","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-200"],"updated_at":"2026-11-02T14:41:50.079409Z"}],"nvd":[{"id":"CVE-2021-21980","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.","status":"published","published":"2021-11-24T17:15:07.623Z","modified":"2026-06-17T03:36:29.723Z","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":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:07:01.428028Z"}]}}