{"id":"CVE-2025-66274","aliases":["EUVD-2025-206925","GHSA-vf98-8xxx-fp8w"],"status":"published","title":"QTS, QuTS hero","description":"A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.\n\nWe have already fixed the vulnerability in the following versions:\nQTS 5.2.9.3410 build 20260214 and later\nQuTS hero h5.2.9.3410 build 20260214 and later\nQuTS hero h5.3.2.3354 build 20251225 and later\nQuTS hero h6.0.0.3397 build 20260206 and later","severity":{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00439,"percentile":0.38658,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-476"],"published":"2026-02-11T12:15:49Z","modified":"2026-06-17T09:56:35Z","products":[{"vendor":"qnap","product":"quts_hero"},{"vendor":"qnap systems inc.","product":"qts"},{"vendor":"qnap systems inc.","product":"quts hero"}],"references":[{"url":"https://www.qnap.com/en/security-advisory/qsa-26-08","tags":["Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-66274"},{"url":"https://github.com/advisories/GHSA-vf98-8xxx-fp8w"}],"sources":{"cve":[{"id":"CVE-2025-66274","title":"QTS, QuTS hero","description":"A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.\n\nWe have already fixed the vulnerability in the following versions:\nQTS 5.2.9.3410 build 20260214 and later\nQuTS hero h5.2.9.3410 build 20260214 and later\nQuTS hero h5.3.2.3354 build 20251225 and later\nQuTS hero h6.0.0.3397 build 20260206 and later","status":"published","published":"2026-02-11T12:15:49.265Z","modified":"2026-06-09T06:17:38.342Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:32:53.157279Z"}],"euvd":[{"id":"EUVD-2025-206925","description":"A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.\n\nWe have already fixed the vulnerability in the following versions:\nQTS 5.2.9.3410 build 20260214 and later\nQuTS hero h5.2.9.3410 build 20260214 and later\nQuTS hero h5.3.2.3354 build 20251225 and later\nQuTS hero h6.0.0.3397 build 20260206 and later","status":"published","published":"2026-02-11T12:15:49Z","modified":"2026-06-09T06:17:38Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T18:20:48.375828Z"}],"ghsa":[{"id":"GHSA-vf98-8xxx-fp8w","title":"A NULL pointer dereference vulnerability has been reported to affect several QNAP operating...","description":"A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.\n\nWe have already fixed the vulnerability in the following version:\nQuTS hero h5.3.2.3354 build 20251225 and later","status":"published","published":"2026-02-11T15:30:26Z","modified":"2026-02-12T18:30:21Z","cvss":[{"version":"4.0","score":1.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/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":"low"},{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T15:06:11.04945Z"}],"nvd":[{"id":"CVE-2025-66274","description":"A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.\n\nWe have already fixed the vulnerability in the following versions:\nQTS 5.2.9.3410 build 20260214 and later\nQuTS hero h5.2.9.3410 build 20260214 and later\nQuTS hero h5.3.2.3354 build 20251225 and later\nQuTS hero h6.0.0.3397 build 20260206 and later","status":"published","published":"2026-02-11T13:15:58.243Z","modified":"2026-06-17T09:56:35.76Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:L/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"},{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:12:00.273026Z"}]}}