{"id":"CVE-2021-20872","aliases":["EUVD-2021-8281","GHSA-8vf2-m489-q377"],"status":"published","title":"Protection mechanism failure vulnerability in KONICA MINOLTA bizhub series (bizhub C750i G00-35...","description":"Protection mechanism failure vulnerability in KONICA MINOLTA bizhub series (bizhub C750i G00-35 and earlier, bizhub C650i/C550i/C450i G00-B6 and earlier, bizhub C360i/C300i/C250i G00-B6 and earlier, bizhub 750i/650i/550i/450i G00-37 and earlier, bizhub 360i/300i G00-33 and earlier, bizhub C287i/C257i/C227i G00-19 and earlier, bizhub 306i/266i/246i/226i G00-B6 and earlier, bizhub C759/C659 GC7-X8 and earlier, bizhub C658/C558/C458 GC7-X8 and earlier, bizhub 958/808/758 GC7-X8 and earlier, bizhub 658e/558e/458e GC7-X8 and earlier, bizhub C287/C227 GC7-X8 and earlier, bizhub 287/227 GC7-X8 and earlier, bizhub 368e/308e GC7-X8 and earlier, bizhub C368/C308/C258 GC9-X4 and earlier, bizhub 558/458/368/308 GC9-X4 and earlier, bizhub C754e/C654e GDQ-M0 and earlier, bizhub 754e/654e GDQ-M0 and earlier, bizhub C554e/C454e GDQ-M1 and earlier, bizhub C364e/C284e/C224e GDQ-M1 and earlier, bizhub 554e/454e/364e/284e/224e GDQ-M1 and earlier, bizhub C754/C654 C554/C454 GR1-M0 and earlier, bizhub C364/C284/C224 GR1-M0 and earlier, bizhub 754/654 GR1-M0 and earlier, bizhub C3851FS/C3851/C3351 GC9-X4 and earlier, bizhub 4752/4052 GC9-X4 and earlier) allows a physical attacker to bypass the firmware integrity verification and to install malicious firmware.","severity":{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.0031,"percentile":0.23977,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2022-01-04T03:05:27Z","modified":"2026-06-17T03:34:35Z","products":[{"vendor":"konica minolta, inc.","product":"bizhub series"},{"vendor":"konicaminolta","product":"bizhub_224e_firmware"},{"vendor":"konicaminolta","product":"bizhub_227_firmware"},{"vendor":"konicaminolta","product":"bizhub_284e_firmware"},{"vendor":"konicaminolta","product":"bizhub_287_firmware"},{"vendor":"konicaminolta","product":"bizhub_308_firmware"},{"vendor":"konicaminolta","product":"bizhub_308e_firmware"},{"vendor":"konicaminolta","product":"bizhub_364e_firmware"},{"vendor":"konicaminolta","product":"bizhub_368_firmware"},{"vendor":"konicaminolta","product":"bizhub_368e_firmware"},{"vendor":"konicaminolta","product":"bizhub_4052_firmware"},{"vendor":"konicaminolta","product":"bizhub_454e_firmware"},{"vendor":"konicaminolta","product":"bizhub_458_firmware"},{"vendor":"konicaminolta","product":"bizhub_458e_firmware"},{"vendor":"konicaminolta","product":"bizhub_4752_firmware"},{"vendor":"konicaminolta","product":"bizhub_554e_firmware"},{"vendor":"konicaminolta","product":"bizhub_558_firmware"},{"vendor":"konicaminolta","product":"bizhub_558e_firmware"},{"vendor":"konicaminolta","product":"bizhub_654_firmware"},{"vendor":"konicaminolta","product":"bizhub_654e_firmware"},{"vendor":"konicaminolta","product":"bizhub_658e_firmware"},{"vendor":"konicaminolta","product":"bizhub_754_firmware"},{"vendor":"konicaminolta","product":"bizhub_754e_firmware"},{"vendor":"konicaminolta","product":"bizhub_758_firmware"},{"vendor":"konicaminolta","product":"bizhub_808_firmware"},{"vendor":"konicaminolta","product":"bizhub_958_firmware"},{"vendor":"konicaminolta","product":"bizhub_c224_firmware"},{"vendor":"konicaminolta","product":"bizhub_c224e_firmware"},{"vendor":"konicaminolta","product":"bizhub_c227_firmware"},{"vendor":"konicaminolta","product":"bizhub_c258_firmware"},{"vendor":"konicaminolta","product":"bizhub_c284_firmware"},{"vendor":"konicaminolta","product":"bizhub_c284e_firmware"},{"vendor":"konicaminolta","product":"bizhub_c287_firmware"},{"vendor":"konicaminolta","product":"bizhub_c308_firmware"},{"vendor":"konicaminolta","product":"bizhub_c3351_firmware"},{"vendor":"konicaminolta","product":"bizhub_c364_firmware"},{"vendor":"konicaminolta","product":"bizhub_c364e_firmware"},{"vendor":"konicaminolta","product":"bizhub_c368_firmware"},{"vendor":"konicaminolta","product":"bizhub_c3851_firmware"},{"vendor":"konicaminolta","product":"bizhub_c3851fs_firmware"},{"vendor":"konicaminolta","product":"bizhub_c454_firmware"},{"vendor":"konicaminolta","product":"bizhub_c454e_firmware"},{"vendor":"konicaminolta","product":"bizhub_c458_firmware"},{"vendor":"konicaminolta","product":"bizhub_c554_firmware"},{"vendor":"konicaminolta","product":"bizhub_c554e_firmware"},{"vendor":"konicaminolta","product":"bizhub_c558_firmware"},{"vendor":"konicaminolta","product":"bizhub_c654_firmware"},{"vendor":"konicaminolta","product":"bizhub_c654e_firmware"},{"vendor":"konicaminolta","product":"bizhub_c658_firmware"},{"vendor":"konicaminolta","product":"bizhub_c659_firmware"},{"vendor":"konicaminolta","product":"bizhub_c754_firmware"},{"vendor":"konicaminolta","product":"bizhub_c754e_firmware"},{"vendor":"konicaminolta","product":"bizhub_c759_firmware"}],"references":[{"url":"https://www.konicaminolta.com/global/newsroom/topics/2021/1224-01-01.html","tags":["x_refsource_MISC","x_transferred","Mitigation","Vendor Advisory"]},{"url":"https://www.konicaminolta.jp/business/support/important/211224_01_01.html","tags":["x_refsource_MISC","x_transferred","Mitigation","Vendor Advisory"]},{"url":"https://jvn.jp/en/vu/JVNVU95192472/index.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://jvn.jp/vu/JVNVU95192472/index.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20872"},{"url":"https://github.com/advisories/GHSA-8vf2-m489-q377"}],"sources":{"cve":[{"id":"CVE-2021-20872","description":"Protection mechanism failure vulnerability in KONICA MINOLTA bizhub series (bizhub C750i G00-35 and earlier, bizhub C650i/C550i/C450i G00-B6 and earlier, bizhub C360i/C300i/C250i G00-B6 and earlier, bizhub 750i/650i/550i/450i G00-37 and earlier, bizhub 360i/300i G00-33 and earlier, bizhub C287i/C257i/C227i G00-19 and earlier, bizhub 306i/266i/246i/226i G00-B6 and earlier, bizhub C759/C659 GC7-X8 and earlier, bizhub C658/C558/C458 GC7-X8 and earlier, bizhub 958/808/758 GC7-X8 and earlier, bizhub 658e/558e/458e GC7-X8 and earlier, bizhub C287/C227 GC7-X8 and earlier, bizhub 287/227 GC7-X8 and earlier, bizhub 368e/308e GC7-X8 and earlier, bizhub C368/C308/C258 GC9-X4 and earlier, bizhub 558/458/368/308 GC9-X4 and earlier, bizhub C754e/C654e GDQ-M0 and earlier, bizhub 754e/654e GDQ-M0 and earlier, bizhub C554e/C454e GDQ-M1 and earlier, bizhub C364e/C284e/C224e GDQ-M1 and earlier, bizhub 554e/454e/364e/284e/224e GDQ-M1 and earlier, bizhub C754/C654 C554/C454 GR1-M0 and earlier, bizhub C364/C284/C224 GR1-M0 and earlier, bizhub 754/654 GR1-M0 and earlier, bizhub C3851FS/C3851/C3351 GC9-X4 and earlier, bizhub 4752/4052 GC9-X4 and earlier) allows a physical attacker to bypass the firmware integrity verification and to install malicious firmware.","status":"published","published":"2022-01-04T03:05:27Z","modified":"2024-08-03T17:53:23.09Z","updated_at":"2026-11-02T14:32:55.564736Z"}],"euvd":[{"id":"EUVD-2021-8281","description":"Protection mechanism failure vulnerability in KONICA MINOLTA bizhub series (bizhub C750i G00-35 and earlier, bizhub C650i/C550i/C450i G00-B6 and earlier, bizhub C360i/C300i/C250i G00-B6 and earlier, bizhub 750i/650i/550i/450i G00-37 and earlier, bizhub 360i/300i G00-33 and earlier, bizhub C287i/C257i/C227i G00-19 and earlier, bizhub 306i/266i/246i/226i G00-B6 and earlier, bizhub C759/C659 GC7-X8 and earlier, bizhub C658/C558/C458 GC7-X8 and earlier, bizhub 958/808/758 GC7-X8 and earlier, bizhub 658e/558e/458e GC7-X8 and earlier, bizhub C287/C227 GC7-X8 and earlier, bizhub 287/227 GC7-X8 and earlier, bizhub 368e/308e GC7-X8 and earlier, bizhub C368/C308/C258 GC9-X4 and earlier, bizhub 558/458/368/308 GC9-X4 and earlier, bizhub C754e/C654e GDQ-M0 and earlier, bizhub 754e/654e GDQ-M0 and earlier, bizhub C554e/C454e GDQ-M1 and earlier, bizhub C364e/C284e/C224e GDQ-M1 and earlier, bizhub 554e/454e/364e/284e/224e GDQ-M1 and earlier, bizhub C754/C654 C554/C454 GR1-M0 and earlier, bizhub C364/C284/C224 GR1-M0 and earlier, bizhub 754/654 GR1-M0 and earlier, bizhub C3851FS/C3851/C3351 GC9-X4 and earlier, bizhub 4752/4052 GC9-X4 and earlier) allows a physical attacker to bypass the firmware integrity verification and to install malicious firmware.","status":"published","published":"2022-01-04T03:05:27Z","modified":"2024-08-03T17:53:23Z","updated_at":"2026-11-03T03:25:07.874589Z"}],"ghsa":[{"id":"GHSA-8vf2-m489-q377","title":"Protection mechanism failure vulnerability in KONICA MINOLTA bizhub series (bizhub C750i G00-35...","description":"Protection mechanism failure vulnerability in KONICA MINOLTA bizhub series (bizhub C750i G00-35 and earlier, bizhub C650i/C550i/C450i G00-B6 and earlier, bizhub C360i/C300i/C250i G00-B6 and earlier, bizhub 750i/650i/550i/450i G00-37 and earlier, bizhub 360i/300i G00-33 and earlier, bizhub C287i/C257i/C227i G00-19 and earlier, bizhub 306i/266i/246i/226i G00-B6 and earlier, bizhub C759/C659 GC7-X8 and earlier, bizhub C658/C558/C458 GC7-X8 and earlier, bizhub 958/808/758 GC7-X8 and earlier, bizhub 658e/558e/458e GC7-X8 and earlier, bizhub C287/C227 GC7-X8 and earlier, bizhub 287/227 GC7-X8 and earlier, bizhub 368e/308e GC7-X8 and earlier, bizhub C368/C308/C258 GC9-X4 and earlier, bizhub 558/458/368/308 GC9-X4 and earlier, bizhub C754e/C654e GDQ-M0 and earlier, bizhub 754e/654e GDQ-M0 and earlier, bizhub C554e/C454e GDQ-M1 and earlier, bizhub C364e/C284e/C224e GDQ-M1 and earlier, bizhub 554e/454e/364e/284e/224e GDQ-M1 and earlier, bizhub C754/C654 C554/C454 GR1-M0 and earlier, bizhub C364/C284/C224 GR1-M0 and earlier, bizhub 754/654 GR1-M0 and earlier, bizhub C3851FS/C3851/C3351 GC9-X4 and earlier, bizhub 4752/4052 GC9-X4 and earlier) allows a physical attacker to bypass the firmware integrity verification and to install malicious firmware.","status":"published","published":"2022-01-05T00:01:11Z","modified":"2023-02-03T05:04:06Z","updated_at":"2026-11-02T14:53:29.32278Z"}],"nvd":[{"id":"CVE-2021-20872","description":"Protection mechanism failure vulnerability in KONICA MINOLTA bizhub series (bizhub C750i G00-35 and earlier, bizhub C650i/C550i/C450i G00-B6 and earlier, bizhub C360i/C300i/C250i G00-B6 and earlier, bizhub 750i/650i/550i/450i G00-37 and earlier, bizhub 360i/300i G00-33 and earlier, bizhub C287i/C257i/C227i G00-19 and earlier, bizhub 306i/266i/246i/226i G00-B6 and earlier, bizhub C759/C659 GC7-X8 and earlier, bizhub C658/C558/C458 GC7-X8 and earlier, bizhub 958/808/758 GC7-X8 and earlier, bizhub 658e/558e/458e GC7-X8 and earlier, bizhub C287/C227 GC7-X8 and earlier, bizhub 287/227 GC7-X8 and earlier, bizhub 368e/308e GC7-X8 and earlier, bizhub C368/C308/C258 GC9-X4 and earlier, bizhub 558/458/368/308 GC9-X4 and earlier, bizhub C754e/C654e GDQ-M0 and earlier, bizhub 754e/654e GDQ-M0 and earlier, bizhub C554e/C454e GDQ-M1 and earlier, bizhub C364e/C284e/C224e GDQ-M1 and earlier, bizhub 554e/454e/364e/284e/224e GDQ-M1 and earlier, bizhub C754/C654 C554/C454 GR1-M0 and earlier, bizhub C364/C284/C224 GR1-M0 and earlier, bizhub 754/654 GR1-M0 and earlier, bizhub C3851FS/C3851/C3351 GC9-X4 and earlier, bizhub 4752/4052 GC9-X4 and earlier) allows a physical attacker to bypass the firmware integrity verification and to install malicious firmware.","status":"published","published":"2022-01-04T04:15:07.457Z","modified":"2026-06-17T03:34:35.17Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.6,"vector":"AV:L/AC:L/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:07:03.418194Z"}]}}