CyberSecBulletin

MarlinFirmware vulnerabilities

We track 1 vulnerability in MarlinFirmware products. 1 is rated high or critical, and none are known to be exploited. The most recent was published on June 24, 2026.

1vulnerabilities
1critical
0high
0exploited
9.1average CVSS score

Latest MarlinFirmware vulnerabilities

  • 9.1 Critical severity

    Marlin: Improper Validation of Array Index

    CVE-2026-56111MarlinFirmware

    Marlin Firmware through 2.1.2.7, fixed in commit 1f255d1, when built with MESH_BED_LEVELING enabled, contains an out-of-bounds write vulnerability in the M421 G-code handler that allows attackers to corrupt firmware memory by supplying out-of-range X and Y gri