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DoS in Rockwell Automation ArmorStart LT via CIP class fuzzing

IdentifiersCVE-2025-9464CWE-400· Uncontrolled Resource Consumption

CVE-2025-9464 is a denial-of-service vulnerability in Rockwell Automation ArmorStart® LT devices. The issue is triggered by fuzzing multiple Common Industrial Protocol (CIP) classes, which can drive uncontrolled resource consumption and cause the device’s CIP port to become unresponsive, resulting in loss of CIP communications/availability.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can cause a denial-of-service condition by rendering the CIP port unresponsive, disrupting CIP communications and availability of affected device functionality (availability impact only).

Mitigation

If you can’t patch tonight, do this now.

Minimize network exposure of control system devices; ensure they are not internet-accessible; place control networks/remote devices behind firewalls and isolate them from business networks; use secure remote access methods (e.g., VPN) and keep them updated; perform impact analysis and risk assessment prior to deploying changes (per CISA guidance).

Remediation

Patch, then assume compromise.

Apply Rockwell Automation’s fixes/updates as provided in security advisory SD1768 for ArmorStart LT devices (notably affected versions are ArmorStart LT 290D/291D/294D up to and including V2.002).
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
Rockwell AutomationArmorstart Lt Firmwareoperating_system

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What this page doesn’t show

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Exposure mapping

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Threat actor evidence

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Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity2

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