High · CVSS 8.7CVE-2026-12656

1732E ArmorBlock® - Multiple VulnerabilitiesCVE-2026-12656

Answer in brief

CVE-2026-12656 records a High severity (CVSS 8.7) vulnerability in 1732E ArmorBlock® - Multiple Vulnerabilities. The current sources do not mark it as known exploited. The current feed maps Rockwell Automation/1732E ArmorBlock® I/O (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 13, 2026Updated Oct 13, 2026Source checked Oct 13, 2026First seen by HOL Oct 13, 2026Material review Oct 13, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.7
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Rockwell Automation/1732E ArmorBlock® I/O (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Rockwell Automation/1732E ArmorBlock® I/Ogeneric	>=0 <=3.012	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Rockwell Automation/1732E ArmorBlock® I/O.
Review the reported fix. Source-reported solution: 3.013 or later

Evidence timeline and material changes

Published upstream
Oct 13, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 13, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 13, 2026

Sources and claim methodology

Source referencerockwellautomation.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.