Vulnerability · Published Sep 1, 2026 · Assigned by Rockwell
CVE-2026-9622RSLinx Classic® - Multiple Vulnerabilities
High 8.7
In plain English
A high-severity security flaw in RSLinx Classic® from Rockwell Automation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).
Severity (CVSS 4.0)8.7High
Exploit odds (30 days)0.4%top 62.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Rockwell Automation | RSLinx Classic® | V4.50 and prior |
Weakness: CWE-191 · 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:N