CVE-2026-9624
RSLinx Classic service crash via crafted CIP packet causing DoS
Is CVE-2026-9624 being exploited?
Not confirmed. CVE-2026-9624 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.31% probability of exploitation in the next 30 days.
How severe is CVE-2026-9624?
CVE-2026-9624 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-9624?
Yes. A fix has been recorded for CVE-2026-9624. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-9624 affect?
CVE-2026-9624 affects Rockwell Automation RSLinx Classic, EtherNet/IP (CIP) networks. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-9624?
Install vendor update; block CIP/EtherNet‑IP from untrusted networks; restart service if crashed
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote denial-of-service: crafted CIP packet crashes RSLinx Classic service, disrupting industrial communications and automation
Immediate action required
- affectedV4.50 and prior
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.