Vulnerability · Published Jun 16, 2026 · Assigned by Rockwell
CVE-2026-0646Rockwell Automation FLEX I/O Dual-port EtherNet/IP Adapters – Multiple Vulnerabilities
High 8.7
In plain English
A high-severity memory leak in FLEX I/O EtherNet/IP Adapters 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 28% of all known vulnerabilities).
Severity (CVSS 4.0)8.7High
Exploit odds (30 days)0.3%top 72.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Rockwell Automation | FLEX I/O EtherNet/IP Adapters | 2.012 |
Weakness: CWE-401 · 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