{"id":"CVE-2021-33540","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-33540","generatedAt":"2026-10-28T05:27:50.329Z","title":"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.","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.","published":"2021-06-25T19:15:10.000Z","lastModified":"2026-06-17T03:54:45.000Z","status":"Modified","sourceIdentifier":"info@cert.vde.com","cvss":{"version":"3.1","score":7.3,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},"cwe":["CWE-798"],"affected":["phoenixcontact/axl f bk pn tps xc firmware","phoenixcontact/axl f bk pn tps firmware","phoenixcontact/axl f bk eip firmware","phoenixcontact/axl f bk eip ef firmware","phoenixcontact/axl f bk eth firmware","phoenixcontact/axl f bk eth xc firmware","phoenixcontact/axl f bk s35 firmware","phoenixcontact/axl f bk pn firmware","phoenixcontact/axl f bk pn xc firmware","phoenixcontact/axl f bk eth net2 firmware","phoenixcontact/axl f bk sas firmware","phoenixcontact/il pn bk-pac firmware","phoenixcontact/il pn bk di8 do4 2tx-pac firmware","phoenixcontact/il pn bk di8 do4 2scrj-pac firmware","phoenixcontact/il eth bk di8 do4 2tx-xc-pac firmware","phoenixcontact/il eth bk di8 do4 2tx-pac firmware","phoenixcontact/il eip bk di8 do4 2tx-pac firmware","phoenixcontact/il s3 bk di8 do4 2tx-pac firmware"],"epss":{"score":0.00723,"percentile":0.5381,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.72%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://cert.vde.com/en-us/advisories/vde-2021-021","tags":["Third Party Advisory"],"source":"info@cert.vde.com"},{"url":"https://cert.vde.com/en-us/advisories/vde-2021-021","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-33540","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}