How severe is CVE-2025-9278?

CVE-2025-9278 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-9278 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-9278?

CVE-2025-9278 affects Rockwellautomation Armorstart Lt Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-9278?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-9278 have an EU (EUVD) identifier?

Yes. CVE-2025-9278 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3428.

When was CVE-2025-9278 published?

CVE-2025-9278 was published on 2026-01-20 and last updated on 2026-06-17.

CVE-2025-9278

CVE-2025-9278 is a high-severity vulnerability in Rockwellautomation Armorstart Lt Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.7
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-3428
Weakness: CWE-400
Affected product: Rockwellautomation Armorstart Lt Firmware
Published: 2026-01-20
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2025-9278?: 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.
How severe is CVE-2025-9278?: CVE-2025-9278 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-9278 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-9278?: CVE-2025-9278 affects Rockwellautomation Armorstart Lt Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-9278?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-9278 have an EU (EUVD) identifier?: Yes. CVE-2025-9278 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3428.
When was CVE-2025-9278 published?: CVE-2025-9278 was published on 2026-01-20 and last updated on 2026-06-17.

References

https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1768.html

Affected products (1)

cpe:2.3:o:rockwellautomation:armorstart_lt_firmware:*:*:*:*:*:*:*:*

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