{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-41539: QTS, QuTS hero","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-41539","status":"final","version":"1","initial_release_date":"2026-06-09T05:51:37.054Z","current_release_date":"2026-06-09T13:12:39.716Z","revision_history":[{"date":"2026-06-09T05:51:37.054Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"A cross-site scripting (XSS) vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to bypass security mechanisms or read application data.\n\nWe have already fixed the vulnerability in the following versions:\nQTS 5.2.9.3492 build 20260507 and later\nQuTS hero h5.2.9.3499 build 20260514 and later\nQuTS hero h5.3.4.3500 build 20260520 and later\nQuTS hero h6.0.0.3500 build 20260520 and later","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-41539 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-41539"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-41539"},{"category":"external","summary":"qnap.com","url":"https://www.qnap.com/en/security-advisory/qsa-26-31"}]},"product_tree":{"branches":[{"category":"vendor","name":"QNAP Systems Inc.","branches":[{"category":"product_name","name":"QTS","branches":[{"category":"product_version_range","name":">=5.2.0 <5.2.9.3492 build 20260507","product":{"name":"QNAP Systems Inc. QTS >=5.2.0 <5.2.9.3492 build 20260507","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:qnap_systems_inc.:qts:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"QNAP Systems Inc.","branches":[{"category":"product_name","name":"QuTS hero","branches":[{"category":"product_version_range","name":">=h5.2.0 <h5.2.9.3499 build 20260514","product":{"name":"QNAP Systems Inc. QuTS hero >=h5.2.0 <h5.2.9.3499 build 20260514","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:qnap_systems_inc.:quts_hero:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=h5.3.0 <h5.3.4.3500 build 20260520","product":{"name":"QNAP Systems Inc. QuTS hero >=h5.3.0 <h5.3.4.3500 build 20260520","product_id":"CSAFPID-3","product_identification_helper":{"cpe":"cpe:2.3:a:qnap_systems_inc.:quts_hero:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=? <h6.0.0.3500 build 20260520","product":{"name":"QNAP Systems Inc. QuTS hero >=? <h6.0.0.3500 build 20260520","product_id":"CSAFPID-4","product_identification_helper":{"cpe":"cpe:2.3:a:qnap_systems_inc.:quts_hero:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-41539","title":"QTS, QuTS hero","notes":[{"category":"description","text":"A cross-site scripting (XSS) vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to bypass security mechanisms or read application data.\n\nWe have already fixed the vulnerability in the following versions:\nQTS 5.2.9.3492 build 20260507 and later\nQuTS hero h5.2.9.3499 build 20260514 and later\nQuTS hero h5.3.4.3500 build 20260520 and later\nQuTS hero h6.0.0.3500 build 20260520 and later","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4"]},"scores":[{"cvss_v4":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","baseScore":8.7,"baseSeverity":"HIGH"},"products":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 5.2.9.3492 build 20260507, h5.2.9.3499 build 20260514, h5.3.4.3500 build 20260520, h6.0.0.3500 build 20260520.","product_ids":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4"]}]}]}