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CVE-2025-14235: Buffer overflow in XPS font fpgm data processing on Small Office Multifunction Printers and Laser Printers(*)

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CRITICAL 9.8REMOTEUPGRADEUPGRADEUPGRADE

CVE-2025-14235 is a critical-severity flaw (CVSS 9.8) affecting mf656cdw firmware, mf653cdw firmware, mf652cw firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in XPS font fpgm data processing on 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 LBP670C Series/Satera MF750C Series firmware v06.02 and earlier sold in Japan.Color imageCLASS LBP630C/Color imageCLASS MF650C Series/imageCLASS LBP230 Series/imageCLASS X LBP1238 II/imageCLASS MF45

Why this priority

  • Critical severity
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score9.8 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.9% (top 40%)
CISA exploited listNo
WeaknessCWE-787
Published2026-01-16
Last modified2026-06-17
Publisher (CNA): Canon Inc. · Vendor: canon

Share: LinkedIn · X · Reddit

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

canon mf656cdw firmware UPGRADE
Affected: <= 06.02
Fixed in: newer than 06.02
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
canon mf653cdw firmware UPGRADE
Affected: <= 06.02
Fixed in: newer than 06.02
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
canon mf652cw firmware UPGRADE
Affected: <= 06.02
Fixed in: newer than 06.02
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
canon mf1238 ii firmware UPGRADE
Affected: <= 06.02
Fixed in: newer than 06.02
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
canon mf1643if ii firmware UPGRADE
Affected: <= 06.02
Fixed in: newer than 06.02
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
canon mf1643i ii firmware UPGRADE
Affected: <= 06.02
Fixed in: newer than 06.02
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-14235?

mf656cdw firmware: upgrade to newer than 06.02; mf653cdw firmware: upgrade to newer than 06.02; mf652cw firmware: upgrade to newer than 06.02. Exact commands for each OS are on this page.

Is CVE-2025-14235 being exploited?

CVE-2025-14235 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-14235 affect?

CVE-2025-14235 affects mf656cdw firmware, mf653cdw firmware, mf652cw firmware. Severity is critical (CVSS 9.8). Buffer overflow in XPS font fpgm data processing on 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

How urgent is CVE-2025-14235?

Priority 54/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Canon printers vulnerabilities

Related CVEs

References

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