CVE-2026-9621

CVSS 9.2 (critical) · published 2026-09-01

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

Weakness: CWE-190

Source: NVD CVE-2026-9621

References

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

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