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Fencer Vulns
high 8.6

CVE-2024-21916 json

Rockwell Automation Denial-of-service Vulnerability in ICE1 Controller

published 2024-01-31 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-19522

cvss
8.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 51%
public exploits
0
none known

Summary

A denial-of-service vulnerability exists in specific Rockwell Automation ControlLogix ang GuardLogix controllers. If exploited, the product could potentially experience a major nonrecoverable fault (MNRF). The device will restart itself to recover from the MNRF.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-24-030-05 updated cvss 8.6

Rockwell Automation ControlLogix and GuardLogix

  • Rockwell Automation ControlLogix 5570 Firmware__20.011 Rockwell Automation ControlLogix 5570 redundant Firmware__20.054_kit1 Rockwell Automation GuardLogix 5570 Firmware__20.011
    affected: vendor fix, mitigation “For more information, see Rockwell Automation's security advisory.” rockwellautomation.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Rockwell Automation ControlLogix® 5570
  • Rockwell Automation GuardLogix® 5570
  • Rockwell Automation ControlLogix® 5570 redundant
  • rockwellautomation controllogix_5570_controller_firmware
  • rockwellautomation guardlogix_5570_controller_firmware
  • rockwellautomation controllogix_5570_redundant_controller_firmware

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.