How severe is CVE-2024-21916?

CVE-2024-21916 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-21916 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-21916?

CVE-2024-21916 primarily affects Rockwellautomation Controllogix 5570 Controller Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-21916?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-21916 have an EU (EUVD) identifier?

Yes. CVE-2024-21916 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19522.

When was CVE-2024-21916 published?

CVE-2024-21916 was published on 2024-01-31 and last updated on 2026-06-17.

CVE-2024-21916

CVE-2024-21916 is a high-severity vulnerability in Rockwellautomation Controllogix 5570 Controller Firmware with a CVSS 3.x base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 3.x base score 8.6)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-19522
Weakness: CWE-119
Affected product: Rockwellautomation Controllogix 5570 Controller Firmware
Published: 2024-01-31
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2024-21916?: 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.
How severe is CVE-2024-21916?: CVE-2024-21916 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-21916 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-21916?: CVE-2024-21916 primarily affects Rockwellautomation Controllogix 5570 Controller Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-21916?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-21916 have an EU (EUVD) identifier?: Yes. CVE-2024-21916 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19522.
When was CVE-2024-21916 published?: CVE-2024-21916 was published on 2024-01-31 and last updated on 2026-06-17.

References

https://www.rockwellautomation.com/en-us/support/advisory.SD1661.html

Affected products (3)

cpe:2.3:o:rockwellautomation:controllogix_5570_controller_firmware:20.011:*:*:*:*:*:*:*
cpe:2.3:o:rockwellautomation:guardlogix_5570_controller_firmware:20.011:*:*:*:*:*:*:*
cpe:2.3:o:rockwellautomation:controllogix_5570_redundant_controller_firmware:20.054_kit1:*:*:*:*:*:*:*

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