High

Denial of Service in Rockwell Automation Micro800 Controllers via Malformed CIP Packets

IdentifiersCVE-2025-13824CWE-763· Release of Invalid Pointer or…

CVE-2025-13824 affects Rockwell Automation Micro800 series controllers, specifically Micro820, Micro850, and Micro870. The issue is caused by improper handling of malformed Common Industrial Protocol (CIP) packets identified during fuzzing. When a specially crafted malformed CIP packet is processed by a vulnerable controller, the device can enter a hard fault state, indicated by a solid red Fault LED, and become unresponsive. After a power cycle, the controller enters a recoverable fault state, with the MS LED and Fault LED flashing red and fault code 0xF019 reported, after which the fault must be cleared to restore operation. The provided supporting content associates this issue with CWE-763.

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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.

Successful exploitation results in a denial-of-service condition on the affected controller. The device can become unresponsive, enter a hard fault or recoverable fault state, and require manual recovery actions such as power cycling and clearing the fault. In industrial environments, this can interrupt controller availability and disrupt dependent automation or manufacturing processes.

Mitigation

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

If immediate remediation is not possible, limit exposure of affected controllers to untrusted networks, implement network segmentation, and follow Rockwell Automation security best practices for ICS deployments. CISA-recommended measures in the provided content include minimizing network exposure, placing control system devices behind firewalls, and using secure remote access such as fully updated VPNs. No CIP-specific workaround beyond reducing exposure is provided in the content for CVE-2025-13824.

Remediation

Patch, then assume compromise.

Rockwell Automation recommends upgrading affected devices to fixed firmware versions. For Micro820 controllers, upgrade to L20E V23.011 or later. For Micro850 and Micro870 controllers, upgrade to V12.013 or later according to the summary data; the Rockwell advisory content further specifies upgrading L50E/L70E models to V23.012 or later and migrating LC50/LC70 models to L50E/L70E V23.012. Apply the vendor-supported corrected firmware path appropriate to the specific hardware model.

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 AutomationMicro820hardware

Rockwell AutomationMicro850hardware

Rockwell AutomationMicro870hardware

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

ACTIVITY FEED

Recent activity

6 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.

6 SOURCESView more in app

No news coverage yet. Advisories and community discussion only.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

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 activity3

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

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2025-13824

NVD

nvd.nist.gov/vuln/detail/CVE-2025-13824

MITRE CWE · CWE-763

Release of Invalid Pointer or Reference

rockwellautomation.com

rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1766.html