{"id":"CVE-2021-36741","aliases":["EUVD-2021-23331","GHSA-7w3v-7x22-4g8v"],"status":"published","title":"An improper input validation vulnerability in Trend Micro Apex One, Apex One as a Service,...","description":"An 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 remote attached to upload arbitrary files on affected installations. Please note: an attacker must first obtain the ability to logon to the product�s management console in order to exploit this vulnerability.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.04951,"percentile":0.92239,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":false,"fix_available":false},"cwes":["CWE-20","CWE-22","CWE-434"],"published":"2021-07-29T19:23:13Z","modified":"2026-06-17T03:59:05Z","kev":{"date_added":"2021-11-03","due_date":"2021-11-17","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2021-11-03"},{"source":"kev","since":"2021-11-03"}],"products":[{"vendor":"trend micro","product":"apex one, apex one as a service, and worry-free business security"},{"vendor":"trend micro","product":"trend micro apex one"},{"vendor":"trend micro","product":"trend micro officescan"},{"vendor":"trend micro","product":"trend micro worry-free business security"},{"vendor":"trend micro, inc.","product":"trend micro worry-free business security"},{"vendor":"trendmicro","product":"apex_one"},{"vendor":"trendmicro","product":"officescan"},{"vendor":"trendmicro","product":"officescan_business_security"},{"vendor":"trendmicro","product":"worry-free_business_security"}],"references":[{"url":"https://success.trendmicro.com/solution/000287819","tags":["x_refsource_MISC","x_transferred","Broken Link","Vendor Advisory"]},{"url":"https://success.trendmicro.com/solution/000287820","tags":["x_refsource_MISC","x_transferred","Broken Link","Vendor Advisory"]},{"url":"https://success.trendmicro.com/jp/solution/000287796","tags":["x_refsource_MISC","x_transferred","Broken Link","Vendor Advisory"]},{"url":"https://success.trendmicro.com/jp/solution/000287815","tags":["x_refsource_MISC","x_transferred","Broken Link","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-36741","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-36741"},{"url":"https://github.com/advisories/GHSA-7w3v-7x22-4g8v"}],"sources":{"cve":[{"id":"CVE-2021-36741","description":"An 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 remote attached to upload arbitrary files on affected installations. Please note: an attacker must first obtain the ability to logon to the product�s management console in order to exploit this vulnerability.","status":"published","published":"2021-07-29T19:23:13Z","modified":"2025-10-21T23:25:39.752Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:33:05.989686Z"}],"euvd":[{"id":"EUVD-2021-23331","description":"An 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 remote attached to upload arbitrary files on affected installations. Please note: an attacker must first obtain the ability to logon to the product�s management console in order to exploit this vulnerability.","status":"published","published":"2021-07-29T19:23:13Z","modified":"2025-10-21T23:25:39Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"exploited_since":"2021-11-03","updated_at":"2026-11-02T20:31:25.901288Z"}],"ghsa":[{"id":"GHSA-7w3v-7x22-4g8v","title":"An improper input validation vulnerability in Trend Micro Apex One, Apex One as a Service,...","description":"An 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 remote attached to upload arbitrary files on affected installations.\n\nPlease note: an attacker must first obtain the ability to logon to the product’s management console in order to exploit this vulnerability.","status":"published","published":"2022-05-24T22:28:24Z","modified":"2025-10-22T00:32:19Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-20","CWE-434"],"updated_at":"2026-11-02T15:04:05.344883Z"}],"kev":[{"id":"CVE-2021-36741","title":"Trend Micro Multiple Products Improper Input Validation Vulnerability","description":"Trend Micro Apex One, Apex One as a Service, and Worry-Free Business Security contain an improper input validation vulnerability that allows a remote attacker to upload files.","cwes":["CWE-22"],"kev":{"date_added":"2021-11-03","due_date":"2021-11-17","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:17.050017Z"}],"nvd":[{"id":"CVE-2021-36741","description":"An 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 remote attached to upload arbitrary files on affected installations. Please note: an attacker must first obtain the ability to logon to the product�s management console in order to exploit this vulnerability.","status":"published","published":"2021-07-29T20:15:07.62Z","modified":"2026-06-17T03:59:05.507Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:06:56.185362Z"}]}}