{"id":"CVE-2021-21004","aliases":["EUVD-2021-8413","GHSA-p92q-6vw3-958m"],"status":"published","title":"Cross-site Scripting Vulnerability in Phoenix Contact FL SWITCH SMCS series products","description":"In Phoenix Contact FL SWITCH SMCS series products in multiple versions an attacker may insert malicious code via LLDP frames into the web-based management which could then be executed by the client.","severity":{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00581,"percentile":0.48194,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-06-25T18:25:52Z","modified":"2026-06-17T03:34:38Z","products":[{"vendor":"phoenix contact","product":"fl nat"},{"vendor":"phoenix contact","product":"fl switch"},{"vendor":"phoenixcontact","product":"fl_nat_smn_8tx-m_firmware"},{"vendor":"phoenixcontact","product":"fl_nat_smn_8tx_firmware"},{"vendor":"phoenixcontact","product":"fl_switch_smcs_14tx\\/2fx-sm_firmware"},{"vendor":"phoenixcontact","product":"fl_switch_smcs_14tx\\/2fx_firmware"},{"vendor":"phoenixcontact","product":"fl_switch_smcs_16tx_firmware"},{"vendor":"phoenixcontact","product":"fl_switch_smcs_4tx-pn_firmware"},{"vendor":"phoenixcontact","product":"fl_switch_smcs_6gt\\/2sfp_firmware"},{"vendor":"phoenixcontact","product":"fl_switch_smcs_6tx\\/2sfp_firmware"},{"vendor":"phoenixcontact","product":"fl_switch_smcs_8gt_firmware"},{"vendor":"phoenixcontact","product":"fl_switch_smcs_8tx-pn_firmware"},{"vendor":"phoenixcontact","product":"fl_switch_smcs_8tx_firmware"},{"vendor":"phoenixcontact","product":"fl_switch_smn_6tx\\/2fx_firmware"},{"vendor":"phoenixcontact","product":"fl_switch_smn_6tx\\/2fx_sm_firmware"},{"vendor":"phoenixcontact","product":"fl_switch_smn_6tx\\/2pof-pn_firmware"},{"vendor":"phoenixcontact","product":"fl_switch_smn_8tx-pn_firmware"}],"references":[{"url":"https://cert.vde.com/en-us/advisories/vde-2021-023","tags":["x_refsource_CONFIRM","x_transferred","Not Applicable","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-21004"},{"url":"https://github.com/advisories/GHSA-p92q-6vw3-958m"}],"sources":{"cve":[{"id":"CVE-2021-21004","title":"Cross-site Scripting Vulnerability in Phoenix Contact FL SWITCH SMCS series products","description":"In Phoenix Contact FL SWITCH SMCS series products in multiple versions an attacker may insert malicious code via LLDP frames into the web-based management which could then be executed by the client.","status":"published","published":"2021-06-25T18:25:52.19Z","modified":"2024-09-16T22:08:28.813Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:33:00.137099Z"}],"euvd":[{"id":"EUVD-2021-8413","description":"In Phoenix Contact FL SWITCH SMCS series products in multiple versions an attacker may insert malicious code via LLDP frames into the web-based management which could then be executed by the client.","status":"published","published":"2021-06-25T18:25:52Z","modified":"2024-09-16T22:08:28Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N","level":"high"}],"updated_at":"2026-11-03T00:55:05.688542Z"}],"ghsa":[{"id":"GHSA-p92q-6vw3-958m","title":"In Phoenix Contact FL SWITCH SMCS series products in multiple versions an attacker may insert...","description":"In Phoenix Contact FL SWITCH SMCS series products in multiple versions an attacker may insert malicious code via LLDP frames into the web-based management which could then be executed by the client.","status":"published","published":"2022-05-24T19:06:18Z","modified":"2023-01-30T05:00:31Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:46:13.539888Z"}],"nvd":[{"id":"CVE-2021-21004","description":"In Phoenix Contact FL SWITCH SMCS series products in multiple versions an attacker may insert malicious code via LLDP frames into the web-based management which could then be executed by the client.","status":"published","published":"2021-06-25T19:15:08.73Z","modified":"2026-06-17T03:34:38.61Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:54.892562Z"}]}}