{"id":"CVE-2021-20637","aliases":["EUVD-2021-8055","GHSA-58p8-f8cp-3h6p"],"status":"published","title":"Improper check or handling of exceptional conditions in LOGITEC LAN-W300N/PR5B allows a remote...","description":"Improper check or handling of exceptional conditions in LOGITEC LAN-W300N/PR5B allows a remote attacker to cause a denial-of-service (DoS) condition by sending a specially crafted URL.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01041,"percentile":0.64446,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-755"],"published":"2021-02-12T06:15:42Z","modified":"2026-06-17T03:34:09Z","products":[{"vendor":"logitec corporation","product":"lan-w300n/pr5b"},{"vendor":"logitech","product":"lan-w300n\\/pr5b_firmware"}],"references":[{"url":"https://www.elecom.co.jp/news/security/20210126-01/","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://jvn.jp/en/jp/JVN96783542/index.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20637"},{"url":"https://github.com/advisories/GHSA-58p8-f8cp-3h6p"}],"sources":{"cve":[{"id":"CVE-2021-20637","description":"Improper check or handling of exceptional conditions in LOGITEC LAN-W300N/PR5B allows a remote attacker to cause a denial-of-service (DoS) condition by sending a specially crafted URL.","status":"published","published":"2021-02-12T06:15:42Z","modified":"2024-08-03T17:45:45.214Z","updated_at":"2026-11-02T14:32:55.564736Z"}],"euvd":[{"id":"EUVD-2021-8055","description":"Improper check or handling of exceptional conditions in LOGITEC LAN-W300N/PR5B allows a remote attacker to cause a denial-of-service (DoS) condition by sending a specially crafted URL.","status":"published","published":"2021-02-12T06:15:42Z","modified":"2024-08-03T17:45:45Z","updated_at":"2026-11-03T03:25:08.888273Z"}],"ghsa":[{"id":"GHSA-58p8-f8cp-3h6p","title":"Improper check or handling of exceptional conditions in LOGITEC LAN-W300N/PR5B allows a remote...","description":"Improper check or handling of exceptional conditions in LOGITEC LAN-W300N/PR5B allows a remote attacker to cause a denial-of-service (DoS) condition by sending a specially crafted URL.","status":"published","published":"2022-05-24T17:42:03Z","modified":"2023-01-29T05:06:30Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-755"],"updated_at":"2026-11-02T14:46:02.46151Z"}],"nvd":[{"id":"CVE-2021-20637","description":"Improper check or handling of exceptional conditions in LOGITEC LAN-W300N/PR5B allows a remote attacker to cause a denial-of-service (DoS) condition by sending a specially crafted URL.","status":"published","published":"2021-02-12T07:15:14.59Z","modified":"2026-06-17T03:34:09.853Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:50.031227Z"}]}}