Loading vulnerability…
CVE-2026-9621 is an improper-input-handling vulnerability in Rockwell Automation RSLinx Classic. The service does not safely handle a malformed Common Industrial Protocol (CIP) packet, allowing a crafted packet to crash the RSLinx Classic service. Service recovery requires a restart.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A network-accessible, low-complexity vulnerability in Rockwell Automation RSLinx Classic that affects availability; the provided CVSS vectors indicate no confidentiality or integrity impact and high availability impact.
A denial-of-service vulnerability in RSLinx Classic caused by improper handling of malformed CIP packets. A crafted packet can crash the RSLinx Classic service, requiring a service restart.
A critical, remotely exploitable denial-of-service vulnerability in Rockwell Automation RSLinx Classic. A crafted malformed CIP packet can crash the RSLinx Classic service, requiring a service restart.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.