CVE-2026-9625: 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-120

Description

A denial-of-service security issue exists within RSLinx® Classic. A crafted CIP packet with an oversized embedded message request 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

Get alerted when CVE-2026-9625 or the next vulnerability affects your stack