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CVE-2021-33012

8.6 HIGH

Rockwell Automation MicroLogix 1100, all versions, allows a remote, unauthenticated attacker sending specially crafted commands to cause ...

Published: 2021-07-09 · Last updated: 2026-06-03

Severity and scoring

CVSS
8.6 HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CWE
CWE-20

Affected products

VendorProduct
rockwellautomationmicrologix_1100_firmware

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.

Source: NVD

References

Related CVEs

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  • CVE-2021-22659 — Rockwell Automation MicroLogix 1400 Version 21.6 and below may allow a remote unauthenticated attacker to send a specially crafted Modbus... (8.6 HIGH)
  • CVE-2020-6990 — Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versi... (9.8 CRITICAL)
  • CVE-2020-6988 — Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versi... (7.5 HIGH)
  • CVE-2020-6984 — Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versi... (7.5 HIGH)

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