CVE-2026-9621
A denial-of-service security issue exists within RSLinx® Classic. The security issue stems from improper handling of a malformed packet. A crafted CIP packet can cause the RSLinx® Classic service to crash, requiring a restart of the service to recover
- Published Sep 1, 2026
- CVSS 9.2 critical
- 0.4% chance of exploitation in the next 30 days (EPSS)