{"id":"CVE-2021-33539","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-33539","generatedAt":"2026-10-27T21:15:02.097Z","title":"In Weidmueller Industrial WLAN devices in multiple versions an exploitable authentication bypass vulnerability exists in the hostname processing.","description":"In Weidmueller Industrial WLAN devices in multiple versions an exploitable authentication bypass vulnerability exists in the hostname processing. A specially configured device hostname can cause the device to interpret selected remote traffic as local traffic, resulting in a bypass of web authentication. An attacker can send authenticated SNMP requests to trigger this vulnerability.","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":7.2,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-287"],"affected":["weidmueller/ie-wl-bl-ap-cl-eu firmware","weidmueller/ie-wlt-bl-ap-cl-eu firmware","weidmueller/ie-wl-bl-ap-cl-us firmware","weidmueller/ie-wlt-bl-ap-cl-us firmware","weidmueller/ie-wl-vl-ap-br-cl-eu firmware","weidmueller/ie-wlt-vl-ap-br-cl-eu firmware","weidmueller/ie-wl-vl-ap-br-cl-us firmware","weidmueller/ie-wlt-vl-ap-br-cl-us firmware"],"epss":{"score":0.01058,"percentile":0.64247,"date":"2026-10-26","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 (1.06%). 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-2021-026","tags":["Third Party Advisory"],"source":"info@cert.vde.com"},{"url":"https://cert.vde.com/en-us/advisories/vde-2021-026","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-33539","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."}