CVE-2023-0854
CWE-122Published: May 11, 2023· Updated: Jun 17, 2026
Official Description
Buffer overflow in NetBIOS QNAME registering and communication 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.
Risk Analysis
A buffer overflow in the NetBIOS QNAME process of Canon printers allows remote attackers to execute arbitrary code or crash the device. This critical vulnerability is remotely exploitable with low complexity.
No public exploit is known, and it is not in the KEV catalog.
Update firmware to a version beyond 11.04. Disable unnecessary network services like NetBIOS if not required.
Technical Analysis
CVE-2023-0854 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
All References (8)
Quick Facts
Related CVEs (CWE-122)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-0854 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts