Vulnerability · Published Oct 13, 2026 · Assigned by Rockwell

CVE-2026-126561732E ArmorBlock® - Multiple Vulnerabilities

High 8.7

In plain English

A high-severity resource allocation without limits in 1732E ArmorBlock® I/O from Rockwell Automation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities).

Severity (CVSS 4.0)8.7High

Exploit odds (30 days)0.3%top 83.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Rockwell Automation	1732E ArmorBlock® I/O	0 – through 3.012

Weakness: CWE-770 · Vector: 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

References

https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1801.html