CVE-2021-20872

Name: CVE-2021-20872
Creator: NVD / NIST
Published: 2022-01-04T04:15:07.457+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.8/10EPSS 0.30%

Last modified Jun 17, 2026

CVE-2021-20872 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. 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.. EPSS estimates a 0.30% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.8/10

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.30%

21.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Konicaminolta	Bizhub C759 Firmware	< gca-y1
Konicaminolta	Bizhub C659 Firmware	< gca-y1
Konicaminolta	Bizhub C658 Firmware	< gca-y1
Konicaminolta	Bizhub C558 Firmware	< gca-y1
Konicaminolta	Bizhub C458 Firmware	< gca-y1
Konicaminolta	Bizhub 958 Firmware	< gca-y1
Konicaminolta	Bizhub 808 Firmware	< gca-y1
Konicaminolta	Bizhub 758 Firmware	< gca-y1
Konicaminolta	Bizhub 658e Firmware	< gca-y1
Konicaminolta	Bizhub 558e Firmware	< gca-y1
Konicaminolta	Bizhub 458e Firmware	< gca-y1
Konicaminolta	Bizhub C287 Firmware	< gca-y0
Konicaminolta	Bizhub C227 Firmware	< gca-y0
Konicaminolta	Bizhub 287 Firmware	< gca-y0
Konicaminolta	Bizhub 227 Firmware	< gca-y0
Konicaminolta	Bizhub 368e Firmware	< gca-x8
Konicaminolta	Bizhub 308e Firmware	< gca-x8
Konicaminolta	Bizhub C368 Firmware	< gca-x4
Konicaminolta	Bizhub C308 Firmware	< gca-x4
Konicaminolta	Bizhub C258 Firmware	< gca-x4
Konicaminolta	Bizhub 558 Firmware	< gca-x4
Konicaminolta	Bizhub 458 Firmware	< gca-x4
Konicaminolta	Bizhub 368 Firmware	< gca-x4
Konicaminolta	Bizhub 308 Firmware	< gca-x4
Konicaminolta	Bizhub C754e Firmware	< gdr-m0
Konicaminolta	Bizhub C654e Firmware	< gdr-m0
Konicaminolta	Bizhub 754e Firmware	< gdr-m0
Konicaminolta	Bizhub 654e Firmware	< gdr-m0
Konicaminolta	Bizhub C554e Firmware	< gdr-m1
Konicaminolta	Bizhub C454e Firmware	< gdr-m1
Konicaminolta	Bizhub C364e Firmware	< gdr-m1
Konicaminolta	Bizhub C284e Firmware	< gdr-m1
Konicaminolta	Bizhub C224e Firmware	< gdr-m1
Konicaminolta	Bizhub 554e Firmware	< gdr-m1
Konicaminolta	Bizhub 454e Firmware	< gdr-m1
Konicaminolta	Bizhub 364e Firmware	< gdr-m1
Konicaminolta	Bizhub 284e Firmware	< gdr-m1
Konicaminolta	Bizhub 224e Firmware	< gdr-m1
Konicaminolta	Bizhub C754 Firmware	< gr4-m0
Konicaminolta	Bizhub C654 Firmware	< gr4-m0
Konicaminolta	Bizhub C554 Firmware	< gr4-m0
Konicaminolta	Bizhub C454 Firmware	< gr4-m0
Konicaminolta	Bizhub C364 Firmware	< gr4-m0
Konicaminolta	Bizhub C284 Firmware	< gr4-m0
Konicaminolta	Bizhub C224 Firmware	< gr4-m0
Konicaminolta	Bizhub 754 Firmware	< gr4-m0
Konicaminolta	Bizhub 654 Firmware	< gr4-m0
Konicaminolta	Bizhub C3851fs Firmware	< gca-x4
Konicaminolta	Bizhub C3851 Firmware	< gca-x4
Konicaminolta	Bizhub C3351 Firmware	< gca-x4

Showing 50 of 52 affected configurations. See NVD for the full list.

References

https://jvn.jp/en/vu/JVNVU95192472/index.htmlThird Party Advisory, VDB Entry
https://jvn.jp/vu/JVNVU95192472/index.htmlThird Party Advisory, VDB Entry
https://www.konicaminolta.com/global/newsroom/topics/2021/1224-01-01.htmlMitigation, Vendor Advisory
https://www.konicaminolta.jp/business/support/important/211224_01_01.htmlMitigation, Vendor Advisory
https://jvn.jp/en/vu/JVNVU95192472/index.htmlThird Party Advisory, VDB Entry
https://jvn.jp/vu/JVNVU95192472/index.htmlThird Party Advisory, VDB Entry
https://www.konicaminolta.com/global/newsroom/topics/2021/1224-01-01.htmlMitigation, Vendor Advisory
https://www.konicaminolta.jp/business/support/important/211224_01_01.htmlMitigation, Vendor Advisory

Timeline

Published: Jan 4, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-20872?

How severe is CVE-2021-20872?

CVE-2021-20872 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 0.30% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20872?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-20872?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST