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CVE-2024-12647: Buffer overflow in CPCA font download processing of Small Office Multifunction Printers and Laser Printers(*)

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CRITICAL 9.8REMOTEUPGRADEUPGRADEUPGRADE

CVE-2024-12647 is a critical-severity flaw (CVSS 9.8) affecting mf455dw firmware, mf453dw firmware, mf452dw firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in CPCA font download processing of 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 MF656Cdw/Satera MF654Cdw firmware v05.04 and earlier sold in Japan. Color imageCLASS MF656Cdw/Color imageCLASS MF654Cdw/Color imageCLASS MF653Cdw/Color imageCLASS MF652Cdw/Color imageCLASS LBP633Cdw

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 chance1.2% (top 32%)
CISA exploited listNo
WeaknessCWE-787
Published2025-01-28
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 mf455dw firmware UPGRADE
Affected: <= 05.04
Fixed in: newer than 05.04
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 mf453dw firmware UPGRADE
Affected: <= 05.04
Fixed in: newer than 05.04
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 mf452dw firmware UPGRADE
Affected: <= 05.04
Fixed in: newer than 05.04
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 mf451dw firmware UPGRADE
Affected: <= 05.04
Fixed in: newer than 05.04
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 mf465dw firmware UPGRADE
Affected: <= 05.04
Fixed in: newer than 05.04
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 mf462dw firmware UPGRADE
Affected: <= 05.04
Fixed in: newer than 05.04
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-2024-12647?

mf455dw firmware: upgrade to newer than 05.04; mf453dw firmware: upgrade to newer than 05.04; mf452dw firmware: upgrade to newer than 05.04. Exact commands for each OS are on this page.

Is CVE-2024-12647 being exploited?

CVE-2024-12647 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-2024-12647 affect?

CVE-2024-12647 affects mf455dw firmware, mf453dw firmware, mf452dw firmware. Severity is critical (CVSS 9.8). Buffer overflow in CPCA font download processing of 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-2024-12647?

Priority 56/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Canon printers vulnerabilities

Related CVEs

References

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