{"id":"CVE-2021-25666","aliases":["EUVD-2021-12558","GHSA-462j-78vj-jjpr"],"status":"published","title":"A vulnerability has been identified in SCALANCE W780 and W740 (IEEE 802.11n) family (All versions...","description":"A vulnerability has been identified in SCALANCE W780 and W740 (IEEE 802.11n) family (All versions \u003c V6.3). Sending specially crafted packets through the ARP protocol to an affected device could cause a partial denial-of-service, preventing the device to operate normally for a short period of time.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00702,"percentile":0.5375,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-770"],"published":"2021-02-09T15:38:21Z","modified":"2026-06-17T03:42:19Z","products":[{"vendor":"siemens","product":"scalance w780 and w740 (ieee 802.11n) family"},{"vendor":"siemens","product":"scalance_w740_firmware"},{"vendor":"siemens","product":"scalance_w780_firmware"}],"references":[{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-686152.pdf","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-040-07","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-25666"},{"url":"https://github.com/advisories/GHSA-462j-78vj-jjpr"}],"sources":{"cve":[{"id":"CVE-2021-25666","description":"A vulnerability has been identified in SCALANCE W780 and W740 (IEEE 802.11n) family (All versions \u003c V6.3). Sending specially crafted packets through the ARP protocol to an affected device could cause a partial denial-of-service, preventing the device to operate normally for a short period of time.","status":"published","published":"2021-02-09T15:38:21Z","modified":"2024-08-03T20:11:27.506Z","cwes":["CWE-770"],"updated_at":"2026-11-02T14:32:59.802172Z"}],"euvd":[{"id":"EUVD-2021-12558","description":"A vulnerability has been identified in SCALANCE W780 and W740 (IEEE 802.11n) family (All versions \u003c V6.3). Sending specially crafted packets through the ARP protocol to an affected device could cause a partial denial-of-service, preventing the device to operate normally for a short period of time.","status":"published","published":"2021-02-09T15:38:21Z","modified":"2024-08-03T20:11:27Z","updated_at":"2026-11-03T03:24:52.420769Z"}],"ghsa":[{"id":"GHSA-462j-78vj-jjpr","title":"A vulnerability has been identified in SCALANCE W780 and W740 (IEEE 802.11n) family (All versions...","description":"A vulnerability has been identified in SCALANCE W780 and W740 (IEEE 802.11n) family (All versions \u003c V6.3). Sending specially crafted packets through the ARP protocol to an affected device could cause a partial denial-of-service, preventing the device to operate normally for a short period of time.","status":"published","published":"2022-05-24T17:41:37Z","modified":"2023-01-29T05:06:27Z","cwes":["CWE-770"],"updated_at":"2026-11-02T14:46:01.439998Z"}],"nvd":[{"id":"CVE-2021-25666","description":"A vulnerability has been identified in SCALANCE W780 and W740 (IEEE 802.11n) family (All versions \u003c V6.3). Sending specially crafted packets through the ARP protocol to an affected device could cause a partial denial-of-service, preventing the device to operate normally for a short period of time.","status":"published","published":"2021-02-09T18:15:51.573Z","modified":"2026-06-17T03:42:19.073Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"primary"},{"version":"2.0","score":3.3,"vector":"AV:A/AC:L/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:06:50.031227Z"}]}}