← Vulnerability feed

Vulnerability record · CVE-2026-9622 · published 1 September 2026

CVE-2026-9622: A denial-of-service security issue exists within RSLinx® Classic.

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.

8.7 CVSS 4.0 High EPSS 0.43% · top 65.5% CWE-191 · CWE-191 Awaiting Analysis
8.7CVSS 4.0 base score
0.43%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
1 Sep 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

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

Track CVE-2026-9622 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2014-0497Adobe Flash Player integer underflow allows remote code executionAdobe Flash Player contains an integer underflow (CWE-191) that allows remote attackers to execute arbitrary code via unspecified vectors. The flaw a…KEVEPSS 100%analysed8.4CVE-2022-0185Linux Kernel Filesystem Context Heap Buffer OverflowThe legacy_parse_param function in the Linux kernel's Filesystem Context functionality fails to properly verify supplied parameter lengths, causing a…KEVEPSS 25%analysed7.8CVE-2021-31956Windows NTFS integer underflow privilege escalationCVE-2021-31956 is an elevation of privilege flaw in the Windows NTFS file system driver, rooted in an integer underflow (CWE-191). A local attacker w…KEVEPSS 22%analysed

Source: NIST National Vulnerability Database (record CVE-2026-9622), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.