{"cve":"CVE-2021-33540","nvd":{"published":"2021-06-25T19:15:09.697","modified":"2026-06-17T03:54:45.217","status":"Modified","description":"In certain devices of the Phoenix Contact AXL F BK and IL BK product families an undocumented password protected FTP access to the root directory exists.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","score":7.3},"cwes":["CWE-798"],"references":["https://cert.vde.com/en-us/advisories/vde-2021-021","https://cert.vde.com/en-us/advisories/vde-2021-021"],"products":["phoenixcontact:axl_f_bk_eip_ef_firmware","phoenixcontact:axl_f_bk_eip_firmware","phoenixcontact:axl_f_bk_eth_firmware","phoenixcontact:axl_f_bk_eth_net2_firmware","phoenixcontact:axl_f_bk_eth_xc_firmware","phoenixcontact:axl_f_bk_pn_firmware","phoenixcontact:axl_f_bk_pn_tps_firmware","phoenixcontact:axl_f_bk_pn_tps_xc_firmware","phoenixcontact:axl_f_bk_pn_xc_firmware","phoenixcontact:axl_f_bk_s35_firmware","phoenixcontact:axl_f_bk_sas_firmware","phoenixcontact:il_eip_bk_di8_do4_2tx-pac_firmware","phoenixcontact:il_eth_bk_di8_do4_2tx-pac_firmware","phoenixcontact:il_eth_bk_di8_do4_2tx-xc-pac_firmware","phoenixcontact:il_pn_bk-pac_firmware","phoenixcontact:il_pn_bk_di8_do4_2scrj-pac_firmware","phoenixcontact:il_pn_bk_di8_do4_2tx-pac_firmware","phoenixcontact:il_s3_bk_di8_do4_2tx-pac_firmware"],"source":"nvd","synced_at":"2026-10-19T21:20:07.141963181+00:00"},"epss":{"cve":"CVE-2021-33540","score":0.00723,"percentile":0.54035,"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."]}