How severe is CVE-2023-6231?

CVE-2023-6231 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-6231 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-6231?

CVE-2023-6231 primarily affects Canon Mf755cdw Firmware. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-6231?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2023-6231 have an EU (EUVD) identifier?

Yes. CVE-2023-6231 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-58478.

When was CVE-2023-6231 published?

CVE-2023-6231 was published on 2024-02-06 and last updated on 2026-06-17.

CVE-2023-6231

CVE-2023-6231 is a critical-severity vulnerability in Canon Mf755cdw Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-58478
Weakness: CWE-787
Affected product: Canon Mf755cdw Firmware
Published: 2024-02-06
Last modified: 2026-06-17

Description

Buffer overflow in WSD probe request process of 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 LBP670C Series/Satera MF750C Series firmware v03.07 and earlier sold in Japan. Color imageCLASS LBP674C/Color imageCLASS X LBP1333C/Color imageCLASS MF750C Series/Color imageCLASS X MF1333C Series firmware v03.07 and earlier sold in US. i-SENSYS LBP673Cdw/C1333P/i-SENSYS MF750C Series/C1333i Series firmware v03.07 and earlier sold in Europe.

Frequently asked questions

What is CVE-2023-6231?: Buffer overflow in WSD probe request process of 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 LBP670C Series/Satera MF750C Series firmware v03.07 and earlier sold in Japan. Color imageCLASS LBP674C/Color imageCLASS X LBP1333C/Color imageCLASS MF750C Series/Color imageCLASS X MF1333C Series firmware v03.07 and earlier sold in US. i-SENSYS LBP673Cdw/C1333P/i-SENSYS MF750C Series/C1333i Series firmware v03.07 and earlier sold in Europe.
How severe is CVE-2023-6231?: CVE-2023-6231 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-6231 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-6231?: CVE-2023-6231 primarily affects Canon Mf755cdw Firmware. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-6231?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2023-6231 have an EU (EUVD) identifier?: Yes. CVE-2023-6231 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-58478.
When was CVE-2023-6231 published?: CVE-2023-6231 was published on 2024-02-06 and last updated on 2026-06-17.

References

Affected products (29)

cpe:2.3:o:canon:mf755cdw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf753cdw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf751cdw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:lbp674c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:lbp672c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:lbp671c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf1238_ii_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf1333c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf1643i_ii_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf1643if_ii_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf275dw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf273dw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf272dw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf455dw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf453dw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf452dw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:mf451dw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:lbp122dw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:lbp1238_ii_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:lbp1333c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:lbp237dw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:lbp236dw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:lbp674cdw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:i-sensys_mf754cdw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:i-sensys_x_c1333if_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:i-sensys_lbp673cdw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:i-sensys_mf752cdw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:i-sensys_x_c1333i_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:canon:i-sensys_x_c1333p_firmware:*:*:*:*:*:*:*:*

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