{"schemaVersion":3,"id":"CVE-2025-66280","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"An integer overflow or wraparound 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 compromise the security of the system.\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 h5.3.4.3500 build 20260520 and later\nQuTS hero h6.0.0.3397 build 20260206 and 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Buffer Overflow","description":"A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).","type":"weakness","status":"Draft","abstraction":"Variant","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/121.html"},{"id":"CWE-190","name":"Integer Overflow or Wraparound","description":"The product performs a calculation that can\n         produce an integer overflow or wraparound when the logic\n         assumes that the resulting value will always be larger than\n         the original value. This occurs when an integer value is\n         incremented to a value that is too large to store in the\n         associated representation. When this occurs, the value may\n         become a very small or negative number.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/190.html"}],"affected":[{"vendor":"qnap systems inc.","product":"qts","name":"QTS","label":"qts","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 5.2.0, < 5.2.9.3410 build 20260214","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 5.2.0, < 5.2.9.3410 build 20260214","eol":null,"hubHref":"/vendor/qnap_systems_inc/qts"},{"vendor":"qnap systems inc.","product":"quts hero","name":"QuTS hero","label":"quts hero","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ h5.2.0, < h5.2.9.3410 build 20260214","noFixRecorded":false,"fixedIn":null},{"text":"≥ h5.3.0, < h5.3.4.3500 build 20260520","noFixRecorded":false,"fixedIn":null},{"text":"≥ ?, < h6.0.0.3397 build 20260206","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ h5.2.0, < h5.2.9.3410 build 20260214 | ≥ h5.3.0, < h5.3.4.3500 build 20260520 | ≥ ?, < h6.0.0.3397 build 20260206","eol":null,"hubHref":"/vendor/qnap_systems_inc/quts_hero"},{"vendor":"qnap","product":"qts","name":"QTS","label":"qts","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"≥ 5.2.0.2737, < 5.2.9.3410","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 5.2.0.2737, < 5.2.9.3410","eol":null,"hubHref":"/vendor/qnap/qts"},{"vendor":"qnap","product":"quts_hero","name":"quts hero","label":"quts_hero","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"≥ h5.2.0.2737, < h5.2.9.3410","noFixRecorded":false,"fixedIn":null},{"text":"≥ h5.3.0.3115, < h5.3.4.3500","noFixRecorded":false,"fixedIn":null},{"text":"≥ h6.0.0.3324, < h6.0.0.3397","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ h5.2.0.2737, < h5.2.9.3410 | ≥ h5.3.0.3115, < h5.3.4.3500 | ≥ h6.0.0.3324, < h6.0.0.3397","eol":null,"hubHref":"/vendor/qnap/quts_hero"}],"affectedCount":4,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://www.qnap.com/en/security-advisory/qsa-26-10","label":"www.qnap.com/en/security-advisory/qsa-26-10","hostname":"www.qnap.com","tags":["Broken Link","Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-06-10T03:05:59.942Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-10T15:52:04.680Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":29,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T12:26:11.959Z","stale":false,"partial":false}}