CVE-2025-2146: Buffer overflow in WebService Authentication processing of Small Office Multifunction Printers and Laser Print
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CRITICAL 9.8REMOTEUPGRADEUPGRADEUPGRADE
CVE-2025-2146 is a critical-severity flaw (CVSS 9.8) affecting satera mf656cdw firmware, satera mf654cdw firmware, satera mf551dw firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Buffer overflow in WebService Authentication 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/Satera MF551dw/Satera MF457dw firmware v05.07 and earlier sold in Japan. Color imageCLASS MF656Cdw/Color imageCLASS MF654Cdw/Color imageCLASS MF653Cdw/Color imageCLAS
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
Published CVE record published
Updated Record last modified
canon satera mf656cdw firmware UPGRADE
Affected: <= 05.07
Fixed in: newer than 05.07
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 satera mf654cdw firmware UPGRADE
Affected: <= 05.07
Fixed in: newer than 05.07
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 satera mf551dw firmware UPGRADE
Affected: <= 05.07
Fixed in: newer than 05.07
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 satera mf457dw firmware UPGRADE
Affected: <= 05.07
Fixed in: newer than 05.07
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 imageclass mf656cdw firmware UPGRADE
Affected: <= 05.07
Fixed in: newer than 05.07
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 imageclass mf654cdw firmware UPGRADE
Affected: <= 05.07
Fixed in: newer than 05.07
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 sourceNVD · 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-2025-2146?
satera mf656cdw firmware: upgrade to newer than 05.07; satera mf654cdw firmware: upgrade to newer than 05.07; satera mf551dw firmware: upgrade to newer than 05.07. Exact commands for each OS are on this page.
Is CVE-2025-2146 being exploited?
CVE-2025-2146 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-2025-2146 affect?
CVE-2025-2146 affects satera mf656cdw firmware, satera mf654cdw firmware, satera mf551dw firmware. Severity is critical (CVSS 9.8). Buffer overflow in WebService Authentication 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 arbitra
How urgent is CVE-2025-2146?
Priority 54/100. Critical severity; Remotely exploitable, no login, no user action
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