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CVE-2023-0854· NVD / CVE Program· CNA Canon

Buffer overflow in NetBIOS QNAME registering and communication process of Office / Small Office Multifunction Printers and Laser Printers(*)

Buffer overflow in NetBIOS QNAME registering and communication process of Office / Small Office Multifunction Printers and Laser Printers(*) which may allow an attacker on the network segment to trigger the affected product being unresponsive or to execute arbitrary code. *:Satera LBP660C Series/LBP620C Series/MF740C Series/MF640C Series firmware Ver.11.04 and earlier sold in Japan. Color imageCLASS LBP660C Series/LBP 620C Series/X LBP1127C/MF740C Series/MF640C Series/X MF1127C firmware Ver.11.04 and earlier sold in US. i-SENSYS LBP660C Series/LBP620C Series/MF740C Series/MF640C Series, C1127P, C1127iF, C1127i firmware Ver.11.04 and earlier sold in Europe.

CriticalCVSS 9.8 · v3.1—No exploit No fix recorded
Published
May 11, 2023
Updated
Jun 17, 2026
EPSS
1.2% · 66th percentile
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JSON

Action score

39

Monitor

Low priority for now.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.2%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
9.8
CNA · Canon
9.8
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Affected systems

VendorProduct
canonmf642cdw firmware
canonmf642cdw
canonmf644cdw firmware
canonmf644cdw
canonmf741cdw firmware
canonmf741cdw
canonmf743cdw firmware
canonmf743cdw
canonmf745cdw firmware
canonmf745cdw
canonlbp621c firmware
canonlbp621c

and 78 more

Affected versions

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

  • canon i-sensys lbp621cw firmwareup to 11.04 inclusive
  • canon i-sensys lbp623cdw firmwareup to 11.04 inclusive
  • canon i-sensys lbp633cdw firmwareup to 11.04 inclusive
  • canon i-sensys lbp664cx firmwareup to 11.04 inclusive
  • canon i-sensys mf641cw firmwareup to 11.04 inclusive
  • canon i-sensys mf643cdw firmwareup to 11.04 inclusive
  • canon i-sensys mf645cx firmwareup to 11.04 inclusive
  • canon i-sensys mf742cdw firmwareup to 11.04 inclusive
  • canon i-sensys mf744cdw firmwareup to 11.04 inclusive
  • canon i-sensys mf746cx firmwareup to 11.04 inclusive
  • canon i-sensys x c1127i firmwareup to 11.04 inclusive
  • canon i-sensys x c1127if firmwareup to 11.04 inclusive
  • canon i-sensys x c1127p firmwareup to 11.04 inclusive
  • canon imageprograf tc-20 firmwareup to 11.04 inclusive
  • canon imageprograf tc-20m firmwareup to 11.04 inclusive
  • canon lbp1127c firmwareup to 11.04 inclusive
  • canon lbp122dw firmwareup to 11.04 inclusive
  • canon lbp621c firmwareup to 11.04 inclusive
  • canon lbp622c firmwareup to 11.04 inclusive
  • canon lbp622cdw firmwareup to 11.04 inclusive

Versions reported by the vendor

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

  • Canon Inc. Canon Office/Small Office Multifunction Printers and Laser Printers

    • Satera LBP660C Series/LBP620C Series/MF740C Series/MF640C Series firmware Ver.11.04 and earlier sold in Japan. Color imageCLASS LBP660C Series/LBP 620C Series/X LBP1127C/MF740C Series/MF640C Series/X affected

Same product

canon: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-0856Buffer overflow in IPP sides attribute process of Office / Small Office Multifunction Printers and Laser Printers(*) which may allow an atta
    39Monitor
  • CVE-2023-0855Buffer overflow in IPP number-up attribute process of Office / Small Office Multifunction Printers and Laser Printers(*) which may allow an
    39Monitor
  • CVE-2023-0853Buffer overflow in mDNS NSEC record registering process of Office / Small Office Multifunction Printers and Laser Printers(*) which may allo
    39Monitor
  • CVE-2023-0852Buffer overflow in the Address Book of Mobile Device function of Office / Small Office Multifunction Printers and Laser Printers(*) which ma
    39Monitor
  • CVE-2023-0851Buffer overflow in CPCA Resource Download process of Office / Small Office Multifunction Printers and Laser Printers(*) which may allow an a
    39Monitor
  • CVE-2023-0857Unintentional change of settings during initial registration of system administrators which uses control protocols.
    30Monitor

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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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

  • Anyone who can reach it over the internet 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
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-122 · Heap-based Buffer Overflow

CVSS vector

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

nvd-primary

Attack context

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

ATT&CK techniques

—

Change log

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

References

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

All records