{"cve":"CVE-2021-1477","nvd":{"published":"2021-04-29T18:15:09.233","modified":"2026-06-17T03:31:52.127","status":"Modified","description":"A vulnerability in an access control mechanism of Cisco Firepower Management Center (FMC) Software could allow an authenticated, remote attacker to access services beyond the scope of their authorization. This vulnerability is due to insufficient enforcement of access control in the affected software. An attacker could exploit this vulnerability by directly accessing the internal services of an affected device. A successful exploit could allow the attacker to overwrite policies and impact the configuration and operation of the affected device.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3},"cwes":["CWE-284"],"references":["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-iac-pZDMQ4wC","https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-iac-pZDMQ4wC"],"products":["cisco:secure_firewall_management_center"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2021-1477","score":0.00677,"percentile":0.52282,"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."]}