{"cve":"CVE-2021-23139","nvd":{"published":"2021-10-21T08:15:07.093","modified":"2026-06-17T03:38:20.217","status":"Modified","description":"A null pointer vulnerability in Trend Micro Apex One and Worry-Free Business Security 10.0 SP1 could allow an attacker to crash the CGI program on affected installations.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-476"],"references":["https://success.trendmicro.com/solution/000289229","https://success.trendmicro.com/solution/000289230","https://success.trendmicro.com/solution/000289229","https://success.trendmicro.com/solution/000289230"],"products":["trendmicro:apex_one","trendmicro:worry-free_business_security","trendmicro:worry-free_business_security_services"],"source":"nvd","synced_at":"2026-10-19T21:24:39.218183596+00:00"},"epss":{"cve":"CVE-2021-23139","score":0.0111,"percentile":0.6593,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}