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High

DoS in Rockwell Automation ArmorStart LT via Achilles Comprehensive grammar tests (unexpected reboot)

IdentifiersCVE-2025-9465CWE-400· Uncontrolled Resource Consumption

CVE-2025-9465 is a denial-of-service vulnerability in Rockwell Automation ArmorStart® LT devices where execution of the Achilles Comprehensive grammar tests can trigger an unexpected device reboot. The reboot causes a temporary outage of the Link State Monitor for several seconds, resulting in loss of availability for monitoring/communications during the reboot window. The weakness is classified as uncontrolled resource consumption (CWE-400). Affected ArmorStart LT models include 290D/291D/294D running versions up to and including V2.002.

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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.

Remote attackers can cause a denial-of-service condition by inducing an unexpected reboot of the ArmorStart LT device, temporarily taking the Link State Monitor down for several seconds and disrupting availability of the device’s network monitoring/operations. CVSS v3.1 is reported as 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), indicating high availability impact with no confidentiality/integrity impact.

Mitigation

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

Per CISA ICS guidance referenced with this issue: minimize network exposure of control system devices, ensure they are not internet-accessible, place control networks/remote devices behind firewalls and isolate them from business networks, and use secure remote access methods (e.g., VPN) with current updates. Perform impact analysis and risk assessment prior to deploying changes.

Remediation

Patch, then assume compromise.

Apply Rockwell Automation’s guidance/updates as provided in security advisory SD1768 for ArmorStart LT (290D/291D/294D) and upgrade to a fixed version if/when made available by the vendor. (Specific fixed version information is not present in the provided content.)
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

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

4 SOURCESView more in app
What this page doesn’t show

The version that knows your environment.

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Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

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

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2025-9465
NVD
nvd.nist.gov/vuln/detail/CVE-2025-9465
MITRE CWE · CWE-400
Uncontrolled Resource Consumption
Vendor Advisory
rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1768.html