What’s Vulnerable › Vulnerabilities

CVE-2026-9622: RSLinx Classic® - Multiple Vulnerabilities

• Severity: high (CVSS 8.7 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-01 · updated 2026-09-01
• Weakness: CWE-191

Description

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.

Affected products

• Rockwell Automation RSLinx Classic®: through V4.50

References

• https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1794.html

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