CVE-2025-9903Network attack vector

Memory corruption via out-of-bounds print-processing write

Published Sep 29, 2025 · Updated Sep 29, 2025

Out-of-bounds writes in Canon Generic Plus printer drivers 3.30 and earlier allow attackers to corrupt memory through malicious print processing. Canon identifies print processing as the vulnerable locus but has not disclosed the affected parser, input structure, or unchecked write operation. Exploitation requires a malicious application, active user interaction, and additional conditions; successful abuse corrupts process memory and can execute malicious code.

CVSS severity5.9
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Out-of-bounds writes in Canon Generic Plus printer drivers 3.30 and earlier allow attackers to corrupt memory through malicious print processing. Canon identifies print processing as the vulnerable locus but has not disclosed the affected parser, input structure, or unchecked write operation. Exploitation requires a malicious application, active user interaction, and additional conditions; successful abuse corrupts process memory and can execute malicious code.

The record

CVE
CVE-2025-9903
Published
Sep 29, 2025
Updated
Sep 29, 2025
Vendor
Canon Inc.
Product
Generic Plus LIPSLX Printer Driver
Classifications
CWE-787, T1204
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 29, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 29, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.30 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Canon Inc. · Generic Plus LIPSLX Printer Driverversion=3.30 and earlier
Canon Inc. · Generic Plus PCL6 Printer Driverversion=3.30 and earlier
Canon Inc. · Generic Plus UFR II Printer Driverversion=3.30 and earlier
Canon Inc. · Generic Plus LIPS4 Printer Driverversion=3.30 and earlier
Canon Inc. · Generic Plus PS Printer Driverversion=3.30 and earlier

Published CVSS scores

5.9Canon Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:L
5.9Canon Inc.CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204User Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo