{"cve":"CVE-2021-41027","nvd":{"published":"2021-12-08T13:15:08.013","modified":"2026-06-17T04:07:46.187","status":"Modified","description":"A stack-based buffer overflow in Fortinet FortiWeb version 6.4.1 and 6.4.0, allows an authenticated attacker to execute unauthorized code or commands via crafted certificates loaded into the device.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-787"],"references":["https://fortiguard.com/advisory/FG-IR-21-134","https://fortiguard.com/advisory/FG-IR-21-134"],"products":["fortinet:fortiweb"],"source":"nvd","synced_at":"2026-10-19T21:25:41.256909649+00:00"},"epss":{"cve":"CVE-2021-41027","score":0.00163,"percentile":0.05457,"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."]}