{"cve":{"cve_id":"CVE-2021-36742","is_kev":true,"kev_date_added":"2021-11-03","kev_vendor_project":"Trend Micro","kev_product":"Apex One, Apex One as a Service, and Worry-Free Business Security","kev_vulnerability_name":"Trend Micro Multiple Products Improper Input Validation Vulnerability","kev_short_description":"Trend Micro Apex One, Apex One as a Service, and Worry-Free Business Security contain an improper input validation vulnerability that allows for privilege escalation.","kev_required_action":"Apply updates per vendor instructions.","kev_due_date":"2021-11-17","kev_known_ransomware":false,"kev_notes":"https://success.trendmicro.com/dcx/s/solution/000287819?language=en_US, https://success.trendmicro.com/dcx/s/solution/000287820?language=en_US; https://nvd.nist.gov/vuln/detail/CVE-2021-36742","kev_cwes":["CWE-20"],"epss_score":0.01482,"epss_percentile":0.70606,"epss_as_of":"2026-06-23","description":"A improper input validation vulnerability in Trend Micro Apex One, Apex One as a Service, OfficeScan XG and Worry-Free Business Security 10.0 SP1 allows a local attacker to escalate privileges on affected installations. Please note: an attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.","published_at":"2021-07-29T19:23:14Z","last_modified_at":null,"cvss_v3_score":7.8,"cvss_v3_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"active","ssvc_automatable":false,"ssvc_technical_impact":"total","cwes":["CWE-20"],"nvd_references":["https://success.trendmicro.com/solution/000287819","https://success.trendmicro.com/solution/000287820","https://success.trendmicro.com/jp/solution/000287796","https://success.trendmicro.com/jp/solution/000287815"],"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":"2026-06-24T00:09:31.350578Z","updated_at":"2026-06-28T23:15:54.683557Z"},"effective_severity":"HIGH","badges":["kev"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"L","value_label":"Local"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"L","value_label":"Low"},{"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":"trend-micro","vendor_name":"Trend Micro","product_slug":"trend-micro-apex-one","product_name":"Trend Micro Apex One","version_start":"2019, SaaS","version_start_inclusive":true,"version_end":"2019, SaaS","version_end_inclusive":true,"cpe23_uri":"cve5:trend-micro:trend-micro-apex-one:2019, SaaS:2019, SaaS"},{"vendor_slug":"trend-micro","vendor_name":"Trend Micro","product_slug":"trend-micro-officescan","product_name":"Trend Micro OfficeScan","version_start":"XG SP1","version_start_inclusive":true,"version_end":"XG SP1","version_end_inclusive":true,"cpe23_uri":"cve5:trend-micro:trend-micro-officescan:XG SP1:XG SP1"},{"vendor_slug":"trend-micro","vendor_name":"Trend Micro","product_slug":"trend-micro-worry-free-business-security","product_name":"Trend Micro Worry-Free Business Security","version_start":"10.0 SP1","version_start_inclusive":true,"version_end":"10.0 SP1","version_end_inclusive":true,"cpe23_uri":"cve5:trend-micro:trend-micro-worry-free-business-security:10.0 SP1:10.0 SP1"}],"exploit_refs":[],"news":[],"references":[{"url":"https://success.trendmicro.com/solution/000287819","source_type":"MISC","tags":[]},{"url":"https://success.trendmicro.com/solution/000287820","source_type":"MISC","tags":[]},{"url":"https://success.trendmicro.com/jp/solution/000287796","source_type":"MISC","tags":[]},{"url":"https://success.trendmicro.com/jp/solution/000287815","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2021-07-29T19:23:14Z","label":"CVE published","source":null},{"type":"cisa_reported","at":"2021-11-03T00:00:00Z","label":"Added to CISA KEV catalog","source":"kev"},{"type":"ssvc_changed","at":"2026-06-24T00:31:44.034298Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-24T00:31:44.034298Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-24T00:31:44.034298Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:44.034298Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:44.034298Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:44.034298Z","label":"CVSS score revised","source":"vulnrichment"}]}