CVE-2023-0854Network attack vector

Code execution via NetBIOS QNAME buffer overflow

Published May 11, 2023 · Updated Feb 10, 2025

Buffer overflow in NetBIOS QNAME processing in Canon printer firmware 11.04 and earlier allows remote attackers to execute arbitrary code. Canon identifies the QNAME registration and communication path as the locus but has not disclosed the operation that writes beyond the buffer. Access to the same network segment is required; successful exploitation can also leave the device unresponsive.

CVSS severity9.8
Critical
EPSS probability1.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in NetBIOS QNAME processing in Canon printer firmware 11.04 and earlier allows remote attackers to execute arbitrary code. Canon identifies the QNAME registration and communication path as the locus but has not disclosed the operation that writes beyond the buffer. Access to the same network segment is required; successful exploitation can also leave the device unresponsive.

The record

CVE
CVE-2023-0854
Published
May 11, 2023
Updated
Feb 10, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-122, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 10, 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

9.8Canon Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1210Exploitation of Remote Services

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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