{"id":"CVE-2025-64394","aliases":["EUVD-2025-211203","GHSA-9h96-gjgh-c298"],"status":"published","title":"A vulnerability allowing a low-privileged local user to write arbitrary files with SYSTEM...","description":"A vulnerability allowing a low-privileged local user to write arbitrary files with SYSTEM privileges during the installation of Veeam Backup for Microsoft 365, which can lead to privilege escalation or denial of service.","severity":{"version":"4.0","score":4.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00107,"percentile":0.01155,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1386"],"published":"2026-10-27T16:16:58Z","modified":"2026-11-04T17:46:50Z","products":[{"vendor":"veeam","product":"backup for microsoft 365"}],"references":[{"url":"https://www.veeam.com/kb4957"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-64394"},{"url":"https://github.com/advisories/GHSA-9h96-gjgh-c298"}],"sources":{"cve":[{"id":"CVE-2025-64394","description":"A vulnerability allowing a low-privileged local user to write arbitrary files with SYSTEM privileges during the installation of Veeam Backup for Microsoft 365, which can lead to privilege escalation or denial of service.","status":"published","published":"2026-10-27T16:16:58.979Z","modified":"2026-11-04T17:46:50.609Z","cvss":[{"version":"4.0","score":4.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-1386"],"updated_at":"2026-11-04T19:06:09.086833Z"}],"euvd":[{"id":"EUVD-2025-211203","description":"A vulnerability allowing a low-privileged local user to write arbitrary files with SYSTEM privileges during the installation of Veeam Backup for Microsoft 365, which can lead to privilege escalation or denial of service.","status":"published","published":"2026-10-27T16:16:58Z","modified":"2026-11-04T17:46:50Z","cvss":[{"version":"4.0","score":4.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-04T19:12:51.694741Z"}],"ghsa":[{"id":"GHSA-9h96-gjgh-c298","title":"A vulnerability allowing a low-privileged local user to write arbitrary files with SYSTEM...","description":"A vulnerability allowing a low-privileged local user to write arbitrary files with SYSTEM privileges during the installation of Veeam Backup for Microsoft 365, which can lead to privilege escalation or denial of service.","status":"published","published":"2026-10-27T18:31:36Z","modified":"2026-10-27T18:31:37Z","cvss":[{"version":"4.0","score":4.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"cwes":["CWE-1386"],"updated_at":"2026-11-02T15:14:30.115077Z"}],"nvd":[{"id":"CVE-2025-64394","description":"A vulnerability allowing a low-privileged local user to write arbitrary files with SYSTEM privileges during the installation of Veeam Backup for Microsoft 365, which can lead to privilege escalation or denial of service.","status":"published","published":"2026-10-27T17:16:53.867Z","modified":"2026-11-04T18:17:34.957Z","cvss":[{"version":"4.0","score":4.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-1386"],"updated_at":"2026-11-04T20:08:23.117709Z"}]}}