NVD / CVE Program· CNA jpcert

CVE-2021-20871: Exposure of sensitive information to an unauthorized actor vulnerability in KONICA MINOLTA bizhub series (bizhub C750i G00-35 and earlier, b

Noroxi assessment

Priority: Monitor (action score 26/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.53% (FIRST EPSS).
Someone on the same network segment can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Exposure of sensitive information to an unauthorized actor 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 C4050i/C3350i/C4000i/C3300i G00-B6 and earlier, bizhub C3320i G00-B6 and earlier, bizhub 4750i/4050i G00-22 and earlier, bizhub 4700i G00-22 and earlier, bizhub C3851FS/C3851/C3351 GC9-X4 and earlier, and bizhub 4752/4052 GC9-X4 and earlier) allows an attacker on the adjacent network to obtain the credentials if the destination information including credentials are registered in the address book via a specific SOAP message.

MediumCVSS 6.5 · v3.1—No exploit No fix recorded

Published: Jan 4, 2022
Updated: Jun 16, 2026
EPSS: 0.5% · 45th percentile
CWE: CWE-200

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 26 / 40 · 6.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.5%

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
No fixed version yet

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
konicaminolta	bizhub c750i firmware	cpe:2.3:o:konicaminolta:bizhub_c750i_firmware
konicaminolta	bizhub c750i	cpe:2.3:h:konicaminolta:bizhub_c750i
konicaminolta	bizhub c650i firmware	cpe:2.3:o:konicaminolta:bizhub_c650i_firmware
konicaminolta	bizhub c650i	cpe:2.3:h:konicaminolta:bizhub_c650i
konicaminolta	bizhub c550i firmware	cpe:2.3:o:konicaminolta:bizhub_c550i_firmware
konicaminolta	bizhub c550i	cpe:2.3:h:konicaminolta:bizhub_c550i
konicaminolta	bizhub c450i firmware	cpe:2.3:o:konicaminolta:bizhub_c450i_firmware
konicaminolta	bizhub c450i	cpe:2.3:h:konicaminolta:bizhub_c450i
konicaminolta	bizhub c360i firmware	cpe:2.3:o:konicaminolta:bizhub_c360i_firmware
konicaminolta	bizhub c360i	cpe:2.3:h:konicaminolta:bizhub_c360i
konicaminolta	bizhub c300i firmware	cpe:2.3:o:konicaminolta:bizhub_c300i_firmware
konicaminolta	bizhub c300i	cpe:2.3:h:konicaminolta:bizhub_c300i

and 148 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

konicaminolta bizhub 224e firmwarebefore gdr-m1
konicaminolta bizhub 226i firmwarebefore g00-e9
konicaminolta bizhub 227 firmwarebefore gca-y0
konicaminolta bizhub 246i firmwarebefore g00-e9
konicaminolta bizhub 266i firmwarebefore g00-e9
konicaminolta bizhub 284e firmwarebefore gdr-m1
konicaminolta bizhub 287 firmwarebefore gca-y0
konicaminolta bizhub 300i firmwarebefore g00-e9
konicaminolta bizhub 306i firmwarebefore g00-e9
konicaminolta bizhub 308 firmwarebefore gca-x4
konicaminolta bizhub 308e firmwarebefore gca-x8
konicaminolta bizhub 360i firmwarebefore g00-e9
konicaminolta bizhub 364e firmwarebefore gdr-m1
konicaminolta bizhub 368 firmwarebefore gca-x4
konicaminolta bizhub 368e firmwarebefore gca-x8
konicaminolta bizhub 4050i firmwarebefore g00-e9
konicaminolta bizhub 4052 firmwarebefore gca-x4
konicaminolta bizhub 450i firmwarebefore g00-e9
konicaminolta bizhub 454e firmwarebefore gdr-m1
konicaminolta bizhub 458 firmwarebefore gca-x4

Versions reported by the vendor

Affected version ranges reported by the assigning authority (jpcert). Independent of NVD's CPE analysis and usually ahead of it.

KONICA MINOLTA, INC. 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 eaaffected

Same product

konicaminolta: all records

Other highest-scoring records for the same primary product.

CVE-2021-20869Exposure of sensitive information to an unauthorized actor vulnerability in KONICA MINOLTA bizhub series (bizhub C750i G00-35 and earlier, b
26Monitor
CVE-2021-20870Improper handling of exceptional conditions vulnerability in KONICA MINOLTA bizhub series (bizhub C750i G00-35 and earlier, bizhub C650i/C55
18Monitor
CVE-2021-20868Incorrect authorization vulnerability in KONICA MINOLTA bizhub series (bizhub C750i G00-35 and earlier, bizhub C650i/C550i/C450i G00-B6 and
18Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Someone on the same network segment can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: none
Availability: none

Attack vector: Adjacent
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: None
Availability impact: None

Weakness class (CWE)

CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor

CVSS vector

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

nvd-primary

Root cause

The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.

The bug in code

The whole CWE-200 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

json

1{
2  "permissions": ["tabs", "<all_urls>"],
3  "background": { "service_worker": "analytics.js" }
4}

Fixed

json

1{
2  "permissions": ["activeTab"],
3  "host_permissions": ["https://yildiz.example/*"]
4}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

jvn.jp/en/vu/JVNVU95192472/index.html

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records