CVE-2018-1000537: Marlin Firmware Marlin version 1.1.x and earlier contains a Buffer Overflow vulnerability in cardreader.cpp (D

Q: How do I fix CVE-2018-1000537?

marlin firmware: upgrade to newer than 1.1.0. Exact commands for each OS are on this page.

Q: Is CVE-2018-1000537 being exploited?

CVE-2018-1000537 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-1000537 affect?

CVE-2018-1000537 affects marlin firmware. Severity is critical (CVSS 9.8). Marlin Firmware Marlin version 1.1.x and earlier contains a Buffer Overflow vulnerability in cardreader.cpp (Depending on branch/version) that can result in Arbitrary code execution. This attack appear to be exploitable via Crafted G-Code i

Q: How urgent is CVE-2018-1000537?

Priority 62/100. Critical severity; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2018-1000537 is a critical-severity flaw (CVSS 9.8) affecting marlin firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Marlin Firmware Marlin version 1.1.x and earlier contains a Buffer Overflow vulnerability in cardreader.cpp (Depending on branch/version) that can result in Arbitrary code execution. This attack appear to be exploitable via Crafted G-Code instruction/file is sent to the printer.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.4% (top 11%)
CISA exploited list	No
Weakness	CWE-119
Published	2018-06-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: marlinfw

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

Am I affected?

Timeline

2018-06-26 16:29 UTCPublished CVE record published
2026-06-17 01:32 UTCUpdated Record last modified

marlinfw marlin firmware UPGRADE

Affected: <= 1.1.0

Fixed in: newer than 1.1.0

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-2018-1000537?

marlin firmware: upgrade to newer than 1.1.0. Exact commands for each OS are on this page.

Is CVE-2018-1000537 being exploited?

CVE-2018-1000537 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-2018-1000537 affect?

CVE-2018-1000537 affects marlin firmware. Severity is critical (CVSS 9.8). Marlin Firmware Marlin version 1.1.x and earlier contains a Buffer Overflow vulnerability in cardreader.cpp (Depending on branch/version) that can result in Arbitrary code execution. This attack appear to be exploitable via Crafted G-Code i

How urgent is CVE-2018-1000537?

Priority 62/100. Critical severity; Remotely exploitable, no login, no user action

References

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