CVE-2026-9621: CWE-190 Integer overflow or wraparound in Rockwell Automation RSLinx Classic®
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
CVE-2026-9621: CWE-190 Integer overflow or wraparound in Rockwell Automation RSLinx Classic®
Description
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
CVSS v4.0
Score 9.2critical
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Rockwell
- Date Reserved
- 2026-05-26T17:18:12.101Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a96d527acd9273b49c2e067
Added to database: 09/01/2026, 13:37:43 UTC
Last updated: 09/01/2026, 15:38:34 UTC
Views: 4
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