CVE-2025-9466
Published: 20 January 2026
Summary
CVE-2025-9466 is a high-severity Uncontrolled Resource Consumption (CWE-400) vulnerability in Rockwellautomation Armorstart Lt Firmware. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Application or System Exploitation (T1499.004); ranked at the 11.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Limiting concurrent sessions directly prevents uncontrolled resource consumption by capping the number of active sessions per user or account.
Analysis identifies uncontrolled resource consumption indicative of denial-of-service or abuse attempts.
Contingency plan testing includes resource exhaustion scenarios to verify recovery, making it harder for attackers to sustain exploits that cause uncontrolled consumption.
Updated contingency plans include current procedures to detect, contain, and recover from resource exhaustion, limiting an attacker's ability to sustain impact from uncontrolled consumption.
Alternate site allows resumption of operations if resource exhaustion at the primary site is exploited to cause unavailability.
Alternate telecommunications services enable resumption of essential functions when primary services become unavailable due to uncontrolled resource consumption.
The team can analyze and respond to resource exhaustion incidents, reducing the impact of attacks that exploit uncontrolled consumption weaknesses.
Timely maintenance support and spare parts enable rapid recovery from failures induced by uncontrolled resource consumption, shortening the impact window of denial-of-service attacks.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Remote unauthenticated exploitation of uncontrolled resource consumption (CWE-400) directly triggers device reboot and temporary service unavailability, matching Application or System Exploitation for Endpoint DoS.
NVD Description
A security issue exists within ArmorStart® LT that can result in a denial-of-service condition. During execution of the Achilles EtherNet/IP and CIP grammar tests, the device reboots unexpectedly, causing the Link State Monitor to go down for several seconds.
Deeper analysisAI
CVE-2025-9466 is a vulnerability in ArmorStart® LT that can trigger a denial-of-service condition. The issue manifests during execution of Achilles EtherNet/IP and CIP grammar tests, causing the device to reboot unexpectedly and the Link State Monitor to go offline for several seconds. It carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) and is linked to CWE-400 (Uncontrolled Resource Consumption).
A remote, unauthenticated attacker can exploit this vulnerability over the network with low attack complexity and no user interaction required. Exploitation results in a temporary denial of service, as the targeted device reboots and its Link State Monitor becomes unavailable for several seconds.
Rockwell Automation's security advisory (SD1768) at https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1768.html provides details on mitigation steps for this vulnerability.
Details
- CWE(s)