{"cve":"CVE-2021-40521","nvd":{"published":"2021-11-10T16:15:09.093","modified":"2026-06-17T04:07:04.917","status":"Modified","description":"Airangel HSMX Gateway devices through 5.2.04 allow Remote Code Execution.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":[],"references":["http://etizazmohsin.com/hsmx.html#rce","https://airangel.com/hsmx-gateway/","http://etizazmohsin.com/hsmx.html#rce","https://airangel.com/hsmx-gateway/"],"products":["airangel:hsmx-app-1000_firmware","airangel:hsmx-app-100_firmware","airangel:hsmx-app-20000_firmware","airangel:hsmx-app-25_firmware","airangel:hsmx-app-5000_firmware"],"source":"nvd","synced_at":"2026-10-19T21:24:39.218183596+00:00"},"epss":{"cve":"CVE-2021-40521","score":0.0449,"percentile":0.91483,"date":"2026-11-01"},"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."]}