CVE-2021-20872: Konicaminolta Bizhub 224e Firmware

Medium severity, CVSS 6.8. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Konicaminolta Bizhub 224e Firmware: before gdr-m1 (fixed in gdr-m1)
• Konicaminolta Bizhub 227 Firmware: before gca-y0 (fixed in gca-y0)
• Konicaminolta Bizhub 284e Firmware: before gdr-m1 (fixed in gdr-m1)
• Konicaminolta Bizhub 287 Firmware: before gca-y0 (fixed in gca-y0)
• Konicaminolta Bizhub 308 Firmware: before gca-x4 (fixed in gca-x4)
• Konicaminolta Bizhub 308e Firmware: before gca-x8 (fixed in gca-x8)
• Konicaminolta Bizhub 364e Firmware: before gdr-m1 (fixed in gdr-m1)
• Konicaminolta Bizhub 368 Firmware: before gca-x4 (fixed in gca-x4)
• Konicaminolta Bizhub 368e Firmware: before gca-x8 (fixed in gca-x8)
• Konicaminolta Bizhub 4052 Firmware: before gca-x4 (fixed in gca-x4)
• Konicaminolta Bizhub 454e Firmware: before gdr-m1 (fixed in gdr-m1)
• Konicaminolta Bizhub 458 Firmware: before gca-x4 (fixed in gca-x4)
• Konicaminolta Bizhub 458e Firmware: before gca-y1 (fixed in gca-y1)
• Konicaminolta Bizhub 4752 Firmware: before gca-x4 (fixed in gca-x4)
• Konicaminolta Bizhub 554e Firmware: before gdr-m1 (fixed in gdr-m1)
• Konicaminolta Bizhub 558 Firmware: before gca-x4 (fixed in gca-x4)
• Konicaminolta Bizhub 558e Firmware: before gca-y1 (fixed in gca-y1)
• Konicaminolta Bizhub 654 Firmware: before gr4-m0 (fixed in gr4-m0)
• Konicaminolta Bizhub 654e Firmware: before gdr-m0 (fixed in gdr-m0)
• Konicaminolta Bizhub 658e Firmware: before gca-y1 (fixed in gca-y1)
• Konicaminolta Bizhub 754 Firmware: before gr4-m0 (fixed in gr4-m0)
• Konicaminolta Bizhub 754e Firmware: before gdr-m0 (fixed in gdr-m0)
• Konicaminolta Bizhub 758 Firmware: before gca-y1 (fixed in gca-y1)
• Konicaminolta Bizhub 808 Firmware: before gca-y1 (fixed in gca-y1)
• Konicaminolta Bizhub 958 Firmware: before gca-y1 (fixed in gca-y1)
• and 27 more

Published 2022-01-04. Last modified 2026-06-17.