{"id":"CVE-2021-34561","aliases":["EUVD-2021-21211","GHSA-9fh3-r25p-cgrm"],"status":"published","title":"A vulnerability in WirelessHART-Gateway \u003c= 3.0.8 allows to bypass any IP or firewall based access restrictions through DNS rebinding","description":"In PEPPERL+FUCHS WirelessHART-Gateway \u003c= 3.0.8 serious issue exists, if the application is not externally accessible or uses IP-based access restrictions. Attackers can use DNS Rebinding to bypass any IP or firewall based access restrictions that may be in place, by proxying through their target's browser.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00868,"percentile":0.59169,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-350"],"published":"2021-08-31T10:32:56Z","modified":"2026-06-17T03:56:07Z","products":[{"vendor":"pepperl-fuchs","product":"wha-gw-f2d2-0-as-z2-eth.eip_firmware"},{"vendor":"pepperl-fuchs","product":"wha-gw-f2d2-0-as-z2-eth_firmware"},{"vendor":"phoenix contact","product":"wha-gw-f2d2-0-as- z2-eth"},{"vendor":"phoenix contact","product":"wha-gw-f2d2-0-as- z2-eth.eip"}],"references":[{"url":"https://cert.vde.com/en-us/advisories/vde-2021-027","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34561"},{"url":"https://github.com/advisories/GHSA-9fh3-r25p-cgrm"}],"sources":{"cve":[{"id":"CVE-2021-34561","title":"A vulnerability in WirelessHART-Gateway \u003c= 3.0.8 allows to bypass any IP or firewall based access restrictions through DNS rebinding","description":"In PEPPERL+FUCHS WirelessHART-Gateway \u003c= 3.0.8 serious issue exists, if the application is not externally accessible or uses IP-based access restrictions. Attackers can use DNS Rebinding to bypass any IP or firewall based access restrictions that may be in place, by proxying through their target's browser.","status":"published","published":"2021-08-31T10:32:56.47Z","modified":"2024-09-17T01:56:32.573Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-350"],"updated_at":"2026-11-02T14:33:11.59359Z"}],"euvd":[{"id":"EUVD-2021-21211","description":"In PEPPERL+FUCHS WirelessHART-Gateway \u003c= 3.0.8 serious issue exists, if the application is not externally accessible or uses IP-based access restrictions. Attackers can use DNS Rebinding to bypass any IP or firewall based access restrictions that may be in place, by proxying through their target's browser.","status":"published","published":"2021-08-31T10:32:56Z","modified":"2024-09-17T01:56:32Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T00:28:45.29969Z"}],"ghsa":[{"id":"GHSA-9fh3-r25p-cgrm","title":"In PEPPERL+FUCHS WirelessHART-Gateway \u003c= 3.0.8 serious issue exists, if the application is not...","description":"In PEPPERL+FUCHS WirelessHART-Gateway \u003c= 3.0.8 serious issue exists, if the application is not externally accessible or uses IP-based access restrictions. Attackers can use DNS Rebinding to bypass any IP or firewall based access restrictions that may be in place, by proxying through their target's browser.","status":"published","published":"2022-05-24T19:12:38Z","modified":"2023-01-28T05:08:35Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-350"],"updated_at":"2026-11-02T14:44:37.39101Z"}],"nvd":[{"id":"CVE-2021-34561","description":"In PEPPERL+FUCHS WirelessHART-Gateway \u003c= 3.0.8 serious issue exists, if the application is not externally accessible or uses IP-based access restrictions. Attackers can use DNS Rebinding to bypass any IP or firewall based access restrictions that may be in place, by proxying through their target's browser.","status":"published","published":"2021-08-31T11:15:07.467Z","modified":"2026-06-17T03:56:07.667Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-350"],"updated_at":"2026-11-02T14:06:57.67549Z"}]}}