Description
A denial-of-service security issue exists within RSLinx® Classic. A crafted CIP packet targeting the Forward Close service can cause the RSLinx® Classic service to crash, requiring a restart of the service to recover.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Rockwell Automation | RSLinx Classic® | V4.50 and prior | — |
Advisories 1
- ICSA-26-244-01 Rockwell Automation RSLinx Classic CISA ICS & IT advisories · Sep 1, 2026