CVE-2026-12656
Received Received - Intake

Denial-of-Service in Rockwell Automation Product Due to Network Storm Traffic

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Rockwell Automation

Description
A denial-of-service security issue exists in the affected product and version. The security issue stems from improper handling of network storm traffic, which can interrupt communication, cause device faults, and affect open TCP and UDP ports. A power cycle is required to recover the device to its normal state.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-13
Generated
2026-10-13
AI Q&A
2026-10-13
EPSS Evaluated
N/A
NVD
CVE-2026-12656
EUVD
EUVD-2026-98745

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Rockwell Automation 1732E ArmorBlock® I/O 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-770 The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

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Executive Summary

This is a denial-of-service vulnerability caused by improper handling of network storm traffic. It can interrupt communication, cause device faults, and affect open TCP and UDP ports. Recovery requires a power cycle to restore the device to normal operation.

Detection Guidance

Detecting this vulnerability requires monitoring for network storm traffic or unusual interruptions in communication. Check for open TCP/UDP ports behaving abnormally. Use network monitoring tools like Wireshark to capture and analyze traffic patterns for signs of network storms or device faults.

Impact Analysis

The vulnerability may lead to service disruptions, loss of network connectivity, and potential device malfunctions. Critical operations relying on the affected product could experience downtime until a power cycle is performed.

Mitigation Strategies

Immediately isolate affected devices from the network to prevent further disruption. Apply network segmentation to limit exposure. Contact Rockwell Automation support for patches or updates. A power cycle may be required to restore normal operation after mitigation.

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