{"id":"CVE-2020-16849","aliases":["EUVD-2020-8807","GHSA-m3wc-g5cv-5v98"],"status":"published","title":"An issue was discovered on Canon MF237w 06.07 devices. An \"Improper Handling of Length Parameter...","description":"An issue was discovered on Canon MF237w 06.07 devices. An \"Improper Handling of Length Parameter Inconsistency\" issue in the IPv4/ICMPv4 component, when handling a packet sent by an unauthenticated network attacker, may expose Sensitive Information.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01144,"percentile":0.66976,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2020-11-30T21:27:58Z","modified":"2026-06-17T02:58:08Z","products":[{"vendor":"canon","product":"ir2202n_firmware"},{"vendor":"canon","product":"ir2204f_firmware"},{"vendor":"canon","product":"ir2204n_firmware"},{"vendor":"canon","product":"ir2206if_firmware"},{"vendor":"canon","product":"ir2206n_firmware"},{"vendor":"canon","product":"lbp113w_firmware"},{"vendor":"canon","product":"lbp151dw_firmware"},{"vendor":"canon","product":"lbp162dw_firmware"},{"vendor":"canon","product":"mf113w_firmware"},{"vendor":"canon","product":"mf212w_firmware"},{"vendor":"canon","product":"mf216n_firmware"},{"vendor":"canon","product":"mf217w_firmware"},{"vendor":"canon","product":"mf226dn_firmware"},{"vendor":"canon","product":"mf229dw_firmware"},{"vendor":"canon","product":"mf231_firmware"},{"vendor":"canon","product":"mf232w_firmware"},{"vendor":"canon","product":"mf237w_firmware"},{"vendor":"canon","product":"mf244dw_firmware"},{"vendor":"canon","product":"mf247dw_firmware"},{"vendor":"canon","product":"mf249dw_firmware"},{"vendor":"canon","product":"mf264dw_firmware"},{"vendor":"canon","product":"mf267dw_firmware"},{"vendor":"canon","product":"mf269dw_firmware"},{"vendor":"canon","product":"mf4570dn_firmware"},{"vendor":"canon","product":"mf4580dn_firmware"},{"vendor":"canon","product":"mf4780w_firmware"},{"vendor":"canon","product":"mf4870dn_firmware"},{"vendor":"canon","product":"mf4890dw_firmware"}],"references":[{"url":"https://www.canon-europe.com/support/product-security/","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://blog.scadafence.com/vulnerability-report-cve-2020-16849","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-16849"},{"url":"https://github.com/advisories/GHSA-m3wc-g5cv-5v98"}],"sources":{"cve":[{"id":"CVE-2020-16849","description":"An issue was discovered on Canon MF237w 06.07 devices. An \"Improper Handling of Length Parameter Inconsistency\" issue in the IPv4/ICMPv4 component, when handling a packet sent by an unauthenticated network attacker, may expose Sensitive Information.","status":"published","published":"2020-11-30T21:27:58Z","modified":"2024-08-04T13:45:34.167Z","updated_at":"2026-11-02T14:35:59.116379Z"}],"euvd":[{"id":"EUVD-2020-8807","description":"An issue was discovered on Canon MF237w 06.07 devices. An \"Improper Handling of Length Parameter Inconsistency\" issue in the IPv4/ICMPv4 component, when handling a packet sent by an unauthenticated network attacker, may expose Sensitive Information.","status":"published","published":"2020-11-30T21:27:58Z","modified":"2024-08-04T13:45:34Z","updated_at":"2026-11-03T03:07:28.222143Z"}],"ghsa":[{"id":"GHSA-m3wc-g5cv-5v98","title":"An issue was discovered on Canon MF237w 06.07 devices. An \"Improper Handling of Length Parameter...","description":"An issue was discovered on Canon MF237w 06.07 devices. An \"Improper Handling of Length Parameter Inconsistency\" issue in the IPv4/ICMPv4 component, when handling a packet sent by an unauthenticated network attacker, may expose Sensitive Information.","status":"published","published":"2022-05-24T17:35:08Z","modified":"2023-01-29T05:04:35Z","updated_at":"2026-11-02T14:45:35.654176Z"}],"nvd":[{"id":"CVE-2020-16849","description":"An issue was discovered on Canon MF237w 06.07 devices. An \"Improper Handling of Length Parameter Inconsistency\" issue in the IPv4/ICMPv4 component, when handling a packet sent by an unauthenticated network attacker, may expose Sensitive Information.","status":"published","published":"2020-11-30T22:15:10.777Z","modified":"2026-06-17T02:58:08.3Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:25.394006Z"}]}}