Vulnerability · Published Jul 14, 2026 · Assigned by Rockwell
CVE-2026-12659Rockwell Automation Flex 5000® Adapter - Denial of Service
High 8.7
In plain English
A high-severity double free in The FLEX 5000® EtherNet/IP Adapter 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 0.4% (higher than 37% of all known vulnerabilities).
Severity (CVSS 4.0)8.7High
Exploit odds (30 days)0.4%top 62.8% 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 products. The security issue stems from improper handling of exceptional conditions when processing crafted CIP packets sent to the adapter. A power cycle is required to recover the module and associated I/O.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Rockwell Automation | The FLEX 5000® EtherNet/IP Adapter | version 6.011 |
Weakness: CWE-415 · 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