What is CVE-2023-0856?

CVE-2023-0856 is a critical-severity vulnerability in Canon Imageprograf Tc-20, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2023-05-11.

How severe is CVE-2023-0856?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Canon Imageprograf Tc-20

CVE-2023-0856

Buffer overflow in IPP sides attribute 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.

Vulnerability class: Buffer Overflow

Published 2023-05-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (66.1th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2023-0856?: CVE-2023-0856 is a critical-severity vulnerability in Canon Imageprograf Tc-20, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2023-05-11.
How severe is CVE-2023-0856?: Critical severity. CVSS v3 base score is 9.8 out of 10.