CVE-2023-0851

Buffer overflow in CPCA Resource Download 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.

Published: 2023-05-11 Last update: 2026-06-17 Assigner: f98c90f0-e9bd-4fa7-911b-51993f3571fd Source: f98c90f0-e9bd-4fa7-911b-51993f3571fd
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-0851 is rated Moderate Risk (61.6/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.14%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-0851

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.51% 1.14% +0.63%
2 2026-05-29 0.41% 0.51% +0.10%
3 2026-05-12 — 0.41% —

Full EPSS history (21 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-0851

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 f98c90f0-e9bd-4fa7-911b-51993f3571fd
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]

Weakness enumeration for CVE-2023-0851

Affected software / configurations for CVE-2023-0851

Vendor Product Version Raw CPE
canon mf642cdw_firmware <= 11.04 cpe:2.3:o:canon:mf642cdw_firmware:*:*:*:*:*:*:*:*
canon mf644cdw_firmware <= 11.04 cpe:2.3:o:canon:mf644cdw_firmware:*:*:*:*:*:*:*:*
canon mf741cdw_firmware <= 11.04 cpe:2.3:o:canon:mf741cdw_firmware:*:*:*:*:*:*:*:*
canon mf743cdw_firmware <= 11.04 cpe:2.3:o:canon:mf743cdw_firmware:*:*:*:*:*:*:*:*
canon mf745cdw_firmware <= 11.04 cpe:2.3:o:canon:mf745cdw_firmware:*:*:*:*:*:*:*:*
canon lbp621c_firmware <= 11.04 cpe:2.3:o:canon:lbp621c_firmware:*:*:*:*:*:*:*:*
canon lbp622c_firmware <= 11.04 cpe:2.3:o:canon:lbp622c_firmware:*:*:*:*:*:*:*:*
canon lbp661c_firmware <= 11.04 cpe:2.3:o:canon:lbp661c_firmware:*:*:*:*:*:*:*:*
canon lbp662c_firmware <= 11.04 cpe:2.3:o:canon:lbp662c_firmware:*:*:*:*:*:*:*:*
canon lbp664c_firmware <= 11.04 cpe:2.3:o:canon:lbp664c_firmware:*:*:*:*:*:*:*:*
canon mf1127c_firmware <= 11.04 cpe:2.3:o:canon:mf1127c_firmware:*:*:*:*:*:*:*:*
canon mf262dw_ii_firmware <= 11.04 cpe:2.3:o:canon:mf262dw_ii_firmware:*:*:*:*:*:*:*:*
canon mf264dw_ii_firmware <= 11.04 cpe:2.3:o:canon:mf264dw_ii_firmware:*:*:*:*:*:*:*:*
canon mf267dw_ii_firmware <= 11.04 cpe:2.3:o:canon:mf267dw_ii_firmware:*:*:*:*:*:*:*:*
canon mf269dw_ii_firmware <= 11.04 cpe:2.3:o:canon:mf269dw_ii_firmware:*:*:*:*:*:*:*:*
canon mf269dw_vp_ii_firmware <= 11.04 cpe:2.3:o:canon:mf269dw_vp_ii_firmware:*:*:*:*:*:*:*:*
canon mf272dw_firmware <= 11.04 cpe:2.3:o:canon:mf272dw_firmware:*:*:*:*:*:*:*:*
canon mf273dw_firmware <= 11.04 cpe:2.3:o:canon:mf273dw_firmware:*:*:*:*:*:*:*:*
canon mf275dw_firmware <= 11.04 cpe:2.3:o:canon:mf275dw_firmware:*:*:*:*:*:*:*:*
canon mf641cw_firmware <= 11.04 cpe:2.3:o:canon:mf641cw_firmware:*:*:*:*:*:*:*:*
canon mf746cdw_firmware <= 11.04 cpe:2.3:o:canon:mf746cdw_firmware:*:*:*:*:*:*:*:*
canon lbp122dw_firmware <= 11.04 cpe:2.3:o:canon:lbp122dw_firmware:*:*:*:*:*:*:*:*
canon lbp1127c_firmware <= 11.04 cpe:2.3:o:canon:lbp1127c_firmware:*:*:*:*:*:*:*:*
canon lbp622cdw_firmware <= 11.04 cpe:2.3:o:canon:lbp622cdw_firmware:*:*:*:*:*:*:*:*
canon lbp623cdw_firmware <= 11.04 cpe:2.3:o:canon:lbp623cdw_firmware:*:*:*:*:*:*:*:*
canon lbp664cdw_firmware <= 11.04 cpe:2.3:o:canon:lbp664cdw_firmware:*:*:*:*:*:*:*:*
canon imageprograf_tc-20_firmware <= 11.04 cpe:2.3:o:canon:imageprograf_tc-20_firmware:*:*:*:*:*:*:*:*
canon imageprograf_tc-20m_firmware <= 11.04 cpe:2.3:o:canon:imageprograf_tc-20m_firmware:*:*:*:*:*:*:*:*
canon pixma_g3270_firmware <= 11.04 cpe:2.3:o:canon:pixma_g3270_firmware:*:*:*:*:*:*:*:*
canon pixma_g4270_firmware <= 11.04 cpe:2.3:o:canon:pixma_g4270_firmware:*:*:*:*:*:*:*:*
canon maxify_gx3020_firmware <= 11.04 cpe:2.3:o:canon:maxify_gx3020_firmware:*:*:*:*:*:*:*:*
canon maxify_gx4020_firmware <= 11.04 cpe:2.3:o:canon:maxify_gx4020_firmware:*:*:*:*:*:*:*:*
canon i-sensys_lbp621cw_firmware <= 11.04 cpe:2.3:o:canon:i-sensys_lbp621cw_firmware:*:*:*:*:*:*:*:*
canon i-sensys_lbp623cdw_firmware <= 11.04 cpe:2.3:o:canon:i-sensys_lbp623cdw_firmware:*:*:*:*:*:*:*:*
canon i-sensys_lbp633cdw_firmware <= 11.04 cpe:2.3:o:canon:i-sensys_lbp633cdw_firmware:*:*:*:*:*:*:*:*
canon i-sensys_lbp664cx_firmware <= 11.04 cpe:2.3:o:canon:i-sensys_lbp664cx_firmware:*:*:*:*:*:*:*:*
canon i-sensys_mf641cw_firmware <= 11.04 cpe:2.3:o:canon:i-sensys_mf641cw_firmware:*:*:*:*:*:*:*:*
canon i-sensys_mf643cdw_firmware <= 11.04 cpe:2.3:o:canon:i-sensys_mf643cdw_firmware:*:*:*:*:*:*:*:*
canon i-sensys_mf645cx_firmware <= 11.04 cpe:2.3:o:canon:i-sensys_mf645cx_firmware:*:*:*:*:*:*:*:*
canon i-sensys_mf742cdw_firmware <= 11.04 cpe:2.3:o:canon:i-sensys_mf742cdw_firmware:*:*:*:*:*:*:*:*
canon i-sensys_mf744cdw_firmware <= 11.04 cpe:2.3:o:canon:i-sensys_mf744cdw_firmware:*:*:*:*:*:*:*:*
canon i-sensys_mf746cx_firmware <= 11.04 cpe:2.3:o:canon:i-sensys_mf746cx_firmware:*:*:*:*:*:*:*:*
canon i-sensys_x_c1127i_firmware <= 11.04 cpe:2.3:o:canon:i-sensys_x_c1127i_firmware:*:*:*:*:*:*:*:*
canon i-sensys_x_c1127if_firmware <= 11.04 cpe:2.3:o:canon:i-sensys_x_c1127if_firmware:*:*:*:*:*:*:*:*
canon i-sensys_x_c1127p_firmware <= 11.04 cpe:2.3:o:canon:i-sensys_x_c1127p_firmware:*:*:*:*:*:*:*:*

References for CVE-2023-0851

cvelogic Threat Intelligence