{"id":"CVE-2025-66592","aliases":["EUVD-2025-209962","GHSA-v5xx-f9gc-j856"],"status":"published","title":"An origin validation error vulnerability in Synology Active Backup for Business Agent before 3.1...","description":"An origin validation error vulnerability in Synology Active Backup for Business Agent before 3.1.0-4967 allows local users to write arbitrary files with restricted content and conduct denial-of-service during installation.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00086,"percentile":0.00293,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-346"],"published":"2026-05-27T08:43:05Z","modified":"2026-10-07T08:10:00Z","products":[{"vendor":"synology","product":"active_backup_for_business_agent"},{"vendor":"synology","product":"synology active backup for business agent"}],"references":[{"url":"https://www.synology.com/en-global/security/advisory/Synology_SA_25_16","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-66592"},{"url":"https://github.com/advisories/GHSA-v5xx-f9gc-j856"}],"sources":{"cve":[{"id":"CVE-2025-66592","description":"An origin validation error vulnerability in Synology Active Backup for Business Agent before 3.1.0-4967 allows local users to write arbitrary files with restricted content and conduct denial-of-service during installation.","status":"published","published":"2026-05-27T08:43:05.069Z","modified":"2026-06-02T08:20:25.069Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-346"],"updated_at":"2026-11-02T14:32:53.157279Z"}],"euvd":[{"id":"EUVD-2025-209962","description":"An origin validation error vulnerability in Synology Active Backup for Business Agent before 3.1.0-4967 allows local users to write arbitrary files with restricted content and conduct denial-of-service during installation.","status":"published","published":"2026-05-27T08:43:05Z","modified":"2026-06-02T08:20:25Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","level":"medium"}],"updated_at":"2026-11-02T18:20:56.977213Z"}],"ghsa":[{"id":"GHSA-v5xx-f9gc-j856","title":"An origin validation error vulnerability in Synology Active Backup for Business Agent before 3.1...","description":"An origin validation error vulnerability in Synology Active Backup for Business Agent before 3.1.0-4967 allows local users to write arbitrary files with restricted content during installation.","status":"published","published":"2026-05-27T09:31:16Z","modified":"2026-05-27T09:31:23Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","level":"medium"}],"cwes":["CWE-346"],"updated_at":"2026-11-02T15:08:20.329411Z"}],"nvd":[{"id":"CVE-2025-66592","description":"An origin validation error vulnerability in Synology Active Backup for Business Agent before 3.1.0-4967 allows local users to write arbitrary files with restricted content and conduct denial-of-service during installation.","status":"published","published":"2026-05-27T09:16:27.633Z","modified":"2026-10-07T08:10:00.2Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.6,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-346"],"updated_at":"2026-11-02T14:12:02.090779Z"}]}}