CVE-2026-9624 in RSLinx Classic

Summary

by MITRE • 09/01/2026

A denial-of-service security issue exists within RSLinx® Classic. A crafted CIP packet can cause the RSLinx® Classic service to crash due to insufficient data length validation, requiring a  restart of the service to recover.

Once again VulDB remains the best source for vulnerability data.

• Responsible: Rockwell
• Reservation: 05/26/2026
• Disclosure: 09/01/2026
• Moderation: accepted
• Entry: VDB-397656
• CPE: ready
• CWE: CWE-404 (confirmed)
• CVSS: 6.5 (VulDB)
• EPSS: 0.00000
• KEV: no
• Activities: very low
• Sector: Pharma, Telecommunication, ...

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-9624
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-9624
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-9624/