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Mallory
High

DoS in Rockwell Automation ArmorStart LT via Defensics fuzzing

IdentifiersCVE-2025-9280CWE-400· Uncontrolled Resource Consumption

A denial-of-service vulnerability in Rockwell Automation ArmorStart® LT where network-based fuzzing (specifically using Defensics) can trigger uncontrolled resource consumption, causing the device to become unresponsive. Recovery requires rebooting the affected device.

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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 results in a denial-of-service condition: the ArmorStart LT device becomes unresponsive (availability loss) and requires a reboot to recover.

Mitigation

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

CISA-recommended ICS mitigations: minimize network exposure and ensure devices are not internet-accessible; place control system 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 defensive measures.

Remediation

Patch, then assume compromise.

Information currently not available in the provided content beyond a reference to Rockwell Automation advisory SD1768.
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

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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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