Cyber Resilience

CVE-2025-9465

HighDDoS

Published: 20 January 2026

Published
20 January 2026
Modified
02 February 2026
KEV Added
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Patch
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CVSS Score v4 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0043 34.0th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2025-9465 is a high-severity Uncontrolled Resource Consumption (CWE-400) vulnerability in Rockwellautomation Armorstart Lt Firmware. Its CVSS base score is 8.7 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Application or System Exploitation (T1499.004); ranked at the 34.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SC-5 (Denial-of-service Protection) and SC-6 (Resource Availability).

Deeper analysis

CVE-2025-9465 is a denial-of-service vulnerability affecting ArmorStart® LT devices. The issue manifests as an unexpected device reboot during execution of the Achilles Comprehensive grammar tests, causing the Link State Monitor to go down 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 network-accessible attacker requires no privileges or user interaction and can exploit the vulnerability with low attack complexity. Successful exploitation results in a high-impact availability disruption, specifically a temporary denial-of-service condition from the device reboot.

Mitigation guidance is available in the Rockwell Automation security advisory at https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1768.html.

EU & UK References

Vulnerability details

A security issue exists within ArmorStart® LT that can result in a denial-of-service condition. During execution of the Achilles Comprehensive grammar tests, the device reboots unexpectedly, causing the Link State Monitor to go down for several seconds.

CWE(s)
CWE-400

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1499.004 Application or System Exploitation Impact
Adversaries may exploit software vulnerabilities that can cause an application or system to crash and deny availability to users.
attack.mitre.org →
Why these techniques?

Vulnerability enables remote exploitation causing device reboot and temporary DoS, matching application/system exploitation for endpoint denial of service.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2025-9283Same product: Rockwellautomation Armorstart Lt
CVE-2025-9464Same product: Rockwellautomation Armorstart Lt
CVE-2025-9278Same product: Rockwellautomation Armorstart Lt
CVE-2025-9466Same product: Rockwellautomation Armorstart Lt
CVE-2025-9280Same product: Rockwellautomation Armorstart Lt
CVE-2025-9279Same product: Rockwellautomation Armorstart Lt
CVE-2025-9282Same product: Rockwellautomation Armorstart Lt
CVE-2025-9281Same product: Rockwellautomation Armorstart Lt
CVE-2024-57076Shared CWE-400
CVE-2025-25293Shared CWE-400

Affected Assets

rockwellautomation
armorstart lt firmware
≤ 2.002

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SC-5 Denial-of-service Protection good match
prevent

SC-5 enforces denial-of-service protections that directly mitigate the network-accessible resource exhaustion attack causing device reboot in this CVE.

SC-6 Resource Availability good match
prevent

SC-6 protects resource availability against uncontrolled consumption (CWE-400) exploited to trigger the unexpected reboot and service disruption.

SI-2 Flaw Remediation good match
prevent

SI-2 ensures timely flaw remediation via vendor patches as provided in the Rockwell Automation advisory for this specific vulnerability.

References