High severity · published Jun 16, 2026
CVE-2026-0646
Rockwell Automation FLEX I/O Dual-port EtherNet/IP Adapters – Multiple Vulnerabilities
8.7
CVSS
0.3%
EPSS
No
On KEV
Description
A denial-of-service security issue exists within the 1794-AENTR adapter due to improper memory handling of CIP protocol requests. This vulnerability can result in the adapter faulting and losing connection to its associated I/O modules, requiring a manual reset to recover.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
FLEX I/O EtherNet/IP Adapters · Rockwell Automation
2.012 · source: vendor
Affected product
FI
FLEX I/O EtherNet/IP Adapters
Rockwell Automation
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-0646
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-0646
www.rockwellautomation.com
https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1775.html
More from FLEX I/O EtherNet/IP Adapters
8.8
CVE-2026-0647
Rockwell Automation FLEX I/O Dual-port EtherNet/IP Adapters – Multiple Vulnerabilities