Denial-of-Service Vulnerability in RSLinx® Classic by Rockwell Automation
CVE-2026-9624

8.7HIGH

Key Information:

Vendor

Rockwell Automation
Status
Rslinx Classic®
Vendor
CVE Published:
1 September 2026

What is CVE-2026-9624?

A security flaw exists in RSLinx® Classic, where a specially crafted CIP packet can lead to service interruption. This issue arises from inadequate validation of data length, which may cause the RSLinx® Classic service to crash. To restore service functionality, a manual restart is required. This vulnerability underscores the importance of robust data handling in industrial network communications to prevent service disruptions.

Affected Version(s)

RSLinx Classic® V4.50 and prior

References

https://www.rockwellautomation.com/en-us/trust-center/sec...

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.