High severity8.6NVD Advisory· Published Jul 9, 2021· Updated Jun 3, 2026
CVE-2021-33012
CVE-2021-33012
Description
Rockwell Automation MicroLogix 1100, all versions, allows a remote, unauthenticated attacker sending specially crafted commands to cause the PLC to fault when the controller is switched to RUN mode, which results in a denial-of-service condition. If successfully exploited, this vulnerability will cause the controller to fault whenever the controller is switched to RUN mode.
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Affected products
2- cpe:2.3:o:rockwellautomation:micrologix_1100_firmware:*:*:*:*:*:*:*:*
- Range: all versions
Patches
Vulnerability mechanics
References
1- us-cert.cisa.gov/ics/advisories/icsa-21-189-01nvdThird Party AdvisoryUS Government Resource
News mentions
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