CVE-2025-9278
Published: 20 January 2026
Summary
CVE-2025-9278 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 33.8th 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 SI-2 (Flaw Remediation).
Deeper analysis
CVE-2025-9278 is a denial-of-service vulnerability affecting ArmorStart® LT devices from Rockwell Automation. The issue, classified under CWE-400 (Uncontrolled Resource Consumption), allows a security scan such as a Burp Suite active scan to trigger a condition where the device loses ICMP connectivity, rendering the web application inaccessible. It has 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), indicating high severity primarily due to its impact on availability.
The vulnerability can be exploited by any unauthenticated attacker with network access to the device, requiring low complexity and no user interaction. By sending traffic mimicking a Burp Suite active scan, the attacker can cause the ArmorStart® LT to enter a denial-of-service state, disrupting ICMP connectivity and blocking access to the web interface.
For mitigation details, refer to Rockwell Automation's security advisory at https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1768.html, published alongside the CVE on 2026-01-20.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-3428
Vulnerability details
A security issue exists within ArmorStart® LT that can result in a denial-of-service condition. After running a Burp Suite active scan, the device loses ICMP connectivity, causing the web application to become inaccessible.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Direct exploitation of the CWE-400 resource consumption flaw in the public web interface triggers application/system DoS, matching T1499.004.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly protects the ArmorStart LT device against denial-of-service events triggered by active scans causing resource exhaustion and loss of ICMP/web connectivity.
Requires timely flaw remediation via vendor patches for this specific CVE, eliminating the uncontrolled resource consumption vulnerability.
Provides protections against resource unavailability due to the CWE-400 uncontrolled consumption attack affecting device availability.