High severity · published Oct 13, 2026
CVE-2026-12656
1732E ArmorBlock® - Multiple Vulnerabilities
8.7
CVSS
0.3%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
1A
1732E ArmorBlock® I/O · Rockwell Automation
through 3.012 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-12656
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-12656
www.rockwellautomation.com
https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1801.html
More from 1732E ArmorBlock® I/O
8.8
CVE-2026-12655
1732E ArmorBlock® - Multiple Vulnerabilities
