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CVE-2026-12656

HIGHCVSS 8.7/10EPSS 0.25%

Last modified

CVE-2026-12656 is a high-severity vulnerability rated 8.7/10 on the CVSS scale. 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. EPSS estimates a 0.25% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 4.0
8.7/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability
0.25%

15.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
Rockwell Automation1732E ArmorBlock® I/O<= 3.012

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2026-12656?
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.
How severe is CVE-2026-12656?
CVE-2026-12656 has a CVSS score of 8.7/10 (HIGH severity). The EPSS model estimates a 0.25% probability of exploitation in the next 30 days.
How do I fix CVE-2026-12656?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

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Source: NVD / NIST