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Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Stack buffer bounds checking
MITRE ATT&CK

1 technique across 1 tactic: Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.

Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
No patch listed yet 1.2% exploitation probability (EPSS)

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AnalysisAI

Buffer overflow in mDNS NSEC record registering process of Office / Small Office Multifunction Printers and Laser Printers(*) which may allow an attacker on the network segment to trigger the. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-121. Buffer overflow in mDNS NSEC record registering 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. Affected products include: Canon Mf642Cdw Firmware, Canon Mf644Cdw Firmware, Canon Mf741Cdw Firmware, Canon Mf743Cdw Firmware, Canon Mf745Cdw Firmware.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionNVD

Buffer overflow in mDNS NSEC record registering 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.

Threat Intelligence Overview

EPSS Score
1.2%
Top 36% exploitable
Data Quality
2 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 1.2%
Patch available No
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

50
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +49
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

A stack-based buffer overflow occurs when a program writes more data to a buffer located on the stack than it was allocated to hold.

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Affected Products (CPE)NVD

cpe:2.3:o:canon:mf642cdw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf644cdw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf741cdw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf743cdw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf745cdw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:lbp621c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:lbp622c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:lbp661c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:lbp662c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:lbp664c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf1127c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf262dw_ii_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf264dw_ii_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf267dw_ii_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf269dw_ii_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf269dw_vp_ii_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf272dw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf273dw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf275dw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf641cw_firmware:*:*:*:*:*:*:*:*
+ 25 more

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