CVE-2023-0859Network attack vector

Arbitrary file installation via malformed import data

Published May 11, 2023 · Updated Jan 24, 2025

Improper input validation in Canon printer firmware 11.04 and earlier allows remote authenticated users to install arbitrary files. The Remote UI Setting Data Import function accepts an attacker-controlled file for installation without correctly validating its specified index, position, or offset. High-privilege access to the network-reachable printer portal is required, and the documented consequence is limited to unauthorized file installation.

CVSS severity2.2
Low
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Canon printer firmware 11.04 and earlier allows remote authenticated users to install arbitrary files. The Remote UI Setting Data Import function accepts an attacker-controlled file for installation without correctly validating its specified index, position, or offset. High-privilege access to the network-reachable printer portal is required, and the documented consequence is limited to unauthorized file installation.

The record

CVE
CVE-2023-0859
Published
May 11, 2023
Updated
Jan 24, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1285, T1105
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

2.2Canon Inc.CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1285Improper Validation of Specified Index, Position, or Offset in Input
T1105Ingress Tool Transfer

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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