CVE-2026-9622

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.

  • Published Sep 1, 2026
  • CVSS 8.7 high
  • 0.4% chance of exploitation in the next 30 days (EPSS)

Affected software

CVE-2026-9622 at the National Vulnerability Database