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
Published: 2026-09-01
Score: 9.2 Critical
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Tue, 01 Sep 2026 13:45:00 +0000

Type Values Removed Values Added
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
Title RSLinx Classic® - Multiple Vulnerabilities
First Time appeared Rockwell Automation
Rockwell Automation rslinx Classic
Weaknesses CWE-190
CPEs cpe:2.3:a:rockwell_automation:rslinx_classic_:v4.50_and_prior:*:*:*:*:*:*:*
Vendors & Products Rockwell Automation
Rockwell Automation rslinx Classic
References
Metrics cvssV4_0

{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H'}

Subscriptions

Rockwell Automation Rslinx Classic
cve-icon MITRE

Status: PUBLISHED

Assigner: Rockwell

Published:

Updated: 2026-09-01T13:33:53.819Z

Reserved: 2026-05-26T17:18:12.101Z

Link: CVE-2026-9621

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-01T14:17:49.377

Modified: 2026-09-01T14:17:49.377

Link: CVE-2026-9621

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-190

    Integer Overflow or Wraparound