{"id":"CVE-2020-3991","aliases":["EUVD-2020-25256","GHSA-6rc8-hqq9-gfph"],"status":"published","title":"VMware Horizon Client for Windows (5.x before 5.5.0) contains a denial-of-service vulnerability...","description":"VMware Horizon Client for Windows (5.x before 5.5.0) contains a denial-of-service vulnerability due to a file system access control issue during install time. Successful exploitation of this issue may allow an attacker to overwrite certain admin privileged files through a symbolic link attack at install time. This will result into a denial-of-service condition on the machine where Horizon Client for Windows is installed.","severity":{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00343,"percentile":0.28163,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2020-10-16T13:15:22Z","modified":"2026-06-17T03:19:23Z","products":[{"vendor":"vmware","product":"horizon_client"},{"vendor":"vmware","product":"vmware horizon client for windows"}],"references":[{"url":"https://www.vmware.com/security/advisories/VMSA-2020-0022.html","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-3991"},{"url":"https://github.com/advisories/GHSA-6rc8-hqq9-gfph"}],"sources":{"cve":[{"id":"CVE-2020-3991","description":"VMware Horizon Client for Windows (5.x before 5.5.0) contains a denial-of-service vulnerability due to a file system access control issue during install time. Successful exploitation of this issue may allow an attacker to overwrite certain admin privileged files through a symbolic link attack at install time. This will result into a denial-of-service condition on the machine where Horizon Client for Windows is installed.","status":"published","published":"2020-10-16T13:15:22Z","modified":"2024-08-04T07:52:20.583Z","updated_at":"2026-11-02T14:35:51.923913Z"}],"euvd":[{"id":"EUVD-2020-25256","description":"VMware Horizon Client for Windows (5.x before 5.5.0) contains a denial-of-service vulnerability due to a file system access control issue during install time. Successful exploitation of this issue may allow an attacker to overwrite certain admin privileged files through a symbolic link attack at install time. This will result into a denial-of-service condition on the machine where Horizon Client for Windows is installed.","status":"published","published":"2020-10-16T13:15:22Z","modified":"2024-08-04T07:52:20Z","updated_at":"2026-11-03T03:08:07.872525Z"}],"ghsa":[{"id":"GHSA-6rc8-hqq9-gfph","title":"VMware Horizon Client for Windows (5.x before 5.5.0) contains a denial-of-service vulnerability...","description":"VMware Horizon Client for Windows (5.x before 5.5.0) contains a denial-of-service vulnerability due to a file system access control issue during install time. Successful exploitation of this issue may allow an attacker to overwrite certain admin privileged files through a symbolic link attack at install time. This will result into a denial-of-service condition on the machine where Horizon Client for Windows is installed.","status":"published","published":"2022-05-24T17:31:05Z","modified":"2023-01-29T05:04:09Z","updated_at":"2026-11-02T14:45:29.424402Z"}],"nvd":[{"id":"CVE-2020-3991","description":"VMware Horizon Client for Windows (5.x before 5.5.0) contains a denial-of-service vulnerability due to a file system access control issue during install time. Successful exploitation of this issue may allow an attacker to overwrite certain admin privileged files through a symbolic link attack at install time. This will result into a denial-of-service condition on the machine where Horizon Client for Windows is installed.","status":"published","published":"2020-10-16T14:15:12.063Z","modified":"2026-06-17T03:19:23.477Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":3.6,"vector":"AV:L/AC:L/Au:N/C:N/I:P/A:P","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T14:06:19.351389Z"}]}}