CVE-2023-0858Network attack vector

Unauthorized Remote UI access via improper authentication

Published May 11, 2023 · Updated Jan 24, 2025

Improper authentication in Canon printer Remote UI firmware 11.04 and earlier allows remote attackers to gain unauthorized access. Canon has not disclosed which Remote UI request bypasses which authentication decision or how untrusted input is mishandled. Exploitation requires network-segment access and user interaction, and the reported consequence is limited to unauthorized disclosure.

CVSS severity3.1
Low
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Canon printer Remote UI firmware 11.04 and earlier allows remote attackers to gain unauthorized access. Canon has not disclosed which Remote UI request bypasses which authentication decision or how untrusted input is mishandled. Exploitation requires network-segment access and user interaction, and the reported consequence is limited to unauthorized disclosure.

The record

CVE
CVE-2023-0858
Published
May 11, 2023
Updated
Jan 24, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-287, CWE-284, T1190
Attack vector
network
Privileges
unauthenticated

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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.1Canon Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
CWE-284Improper Access Control
T1190Exploit Public-Facing Application

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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