{"cve":{"cve_id":"CVE-2021-34344","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.01528,"epss_percentile":0.71455,"epss_as_of":"2026-06-23","description":"A stack buffer overflow vulnerability has been reported to affect QNAP device running QUSBCam2. If exploited, this vulnerability allows attackers to execute arbitrary code. We have already fixed this vulnerability in the following versions of QUSBCam2: QTS 4.5.4: QUSBCam2 1.1.4 ( 2021/07/30 ) and later QTS 5.0: QUSBCam2 2.0.1 ( 2021/08/03 ) and later QTS 4.3.6: QUSBCam2 1.1.4 ( 2021/07/30 ) and later QTS 4.3.3: QUSBCam2 1.1.4 ( 2021/08/06 ) and later QuTS hero 4.5.3: QUSBCam2 1.1.4 ( 2021/07/30 ) and later","published_at":"2021-09-10T04:00:24.634000Z","last_modified_at":null,"cvss_v3_score":9.8,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_v3_severity":"CRITICAL","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-787"],"nvd_references":["https://www.qnap.com/en/security-advisory/qsa-21-34"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:15:45.770202Z"},"effective_severity":"CRITICAL","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"qnap-systems-inc.","vendor_name":"QNAP Systems Inc.","product_slug":"qusbcam2","product_name":"QUSBCam2","version_start":"unspecified","version_start_inclusive":true,"version_end":"1.1.4 ( 2021/07/30 )","version_end_inclusive":false,"cpe23_uri":"cve5:qnap-systems-inc.:qusbcam2:unspecified:1.1.4 ( 2021/07/30 )"},{"vendor_slug":"qnap-systems-inc.","vendor_name":"QNAP Systems Inc.","product_slug":"qusbcam2","product_name":"QUSBCam2","version_start":"unspecified","version_start_inclusive":true,"version_end":"2.0.1 ( 2021/08/03 )","version_end_inclusive":false,"cpe23_uri":"cve5:qnap-systems-inc.:qusbcam2:unspecified:2.0.1 ( 2021/08/03 )"},{"vendor_slug":"qnap-systems-inc.","vendor_name":"QNAP Systems Inc.","product_slug":"qusbcam2","product_name":"QUSBCam2","version_start":"unspecified","version_start_inclusive":true,"version_end":"1.1.4 ( 2021/08/06 )","version_end_inclusive":false,"cpe23_uri":"cve5:qnap-systems-inc.:qusbcam2:unspecified:1.1.4 ( 2021/08/06 )"}],"exploit_refs":[],"news":[],"references":[{"url":"https://www.qnap.com/en/security-advisory/qsa-21-34","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2021-09-10T04:00:24.634000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:18:38.387826Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:18:38.387826Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:18:38.387826Z","label":"CVSS score revised","source":"cvelistv5"}]}