EUVD-2026-43672
GHSA-h5wm-63j8-q5vc
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessCraft malicious Arena model file
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DeliveryDeliver file via email or share
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ExploitUser opens file in Arena
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ExecutionTrigger out-of-bounds write in linker.exe
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ImpactExecute arbitrary code as current user
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, write limits
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Exploitation requires the victim to open an attacker-supplied malicious Arena/SIMAN model file in Arena Simulation on the local machine - the crafted file is processed by the linker.exe (Siman) component, whose improper validation of the file's user-supplied data triggers the out-of-bounds write. Limiting factors that reduce realistic risk: the attack is local (AV:L) with no network-reachable component, it mandates user interaction (UI:P - the user must be socially engineered into opening the file), and code runs only with the current user's privileges (no automatic privilege escalation). The vendor further marks PR:L, implying the attacker may need some level of local access/privilege, though the description's 'convince a user to open a malicious file' phrasing is more consistent with PR:N - confirm the exact privilege prerequisite with Rockwell advisory SD1784. |
| Impact | The vendor CVSS 4.0 vector (AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H) scores 7.0 (High) and paints this as a local, user-interaction-dependent RCE rather than a remotely reachable service flaw - meaning it is a client-side 'malicious document' style bug, not a wormable network vulnerability. Impact is high across confidentiality, integrity, and availability because successful exploitation yields code execution as the current user. However, exploitation is gated by requiring a victim to open a malicious file (UI:P/passive interaction) and local access, which meaningfully lowers practical risk. Note a discrepancy worth flagging: the vendor marks PR:L, yet the described attack (tricking any user into opening a file) does not obviously require pre-existing privileges - an independent read of the description supports PR:N/UI:R; verify privilege prerequisites with Rockwell. With no KEV listing, no cited POC, and no EPSS value in the input, this is best treated as a standard patch-management priority for Arena operators rather than an emergency; the absence of exploitation signals suggests low likelihood of widespread opportunistic attacks. |
| Exploit ScenarioDerived | An attacker crafts a malicious Arena simulation model file with data engineered to trigger the out-of-bounds write in linker.exe and delivers it to a target engineer via email, a shared drive, or a project handoff. When the engineer opens the file in Arena Simulation, the memory corruption is triggered and the attacker's shellcode runs with that user's privileges. No public exploit code is currently identified, and success depends on the local user being persuaded to open the file (AV:L/UI:P). |
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Alert meAnalysisAIv1 – Jul 14, 2026
Arbitrary code execution in Rockwell Automation Arena Simulation is possible through an out-of-bounds write in the linker.exe (Siman) component, which fails to properly validate user-supplied data parsed from simulation model files. A local attacker who convinces a user to open a specially crafted Arena file can corrupt memory and run code in the context of the current user. No public exploit has been identified at time of analysis, the issue is not in CISA KEV, and no EPSS score was provided, so real-world exploitation appears theoretical rather than observed.
RemediationAI
Consult Rockwell Automation Security Advisory SD1784 (https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1784.html) and upgrade Arena Simulation to the fixed release identified there - a patch is available per the vendor advisory, though the input does not specify the exact patched version number, so obtain it directly from SD1784. Until patched, apply file-handling hygiene as the primary compensating control: do not open Arena/SIMAN model files (e.g., .doe and related model artifacts) received from untrusted or unverified sources, and treat such files like any other executable content. Restrict Arena to trusted engineering workstations and use standard-user (non-administrator) accounts so that code executing 'in the context of the current user' has minimal privilege, limiting blast radius; the trade-off is reduced convenience for engineers who routinely exchange model files. Application allow-listing and blocking Arena from spawning child processes can further contain post-exploitation, at the cost of tuning to avoid breaking legitimate simulation workflows.
Affected VersionsENISA
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Technical ContextAI · show details
Arena Simulation is Rockwell Automation's discrete-event modeling and simulation product used in industrial, manufacturing, and process-engineering environments; the flawed code lives in linker.exe, which is tied to the underlying SIMAN simulation language/engine that links and processes model definitions. The root cause is CWE-787 (Out-of-Bounds Write): during parsing of attacker-controlled file content the component computes a write location or length from unvalidated input, allowing data to be written past the bounds of the intended memory buffer. Because the corrupted write occurs in a native Windows desktop executable, controlled overwrites of adjacent memory (heap/stack structures, pointers) can be steered toward control-flow hijacking and code execution, consistent with the reporter's 'Buffer Overflow / Memory Corruption / RCE' tags.
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Severity by source
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Local file-open RCE: AV:L and UI:R because the victim must open a malicious file; PR:N since no attacker privileges are needed; full C/I/A impact as code runs as the user.
Primary rating from Vendor (rockwellautomation).
CVSS VectorVendor: rockwellautomation
DescriptionCVE.org
A security issue exists within Arena® Simulation due to a memory corruption vulnerability in the linker.exe (Siman) component. The vulnerability stems from improper validation of user-supplied data, which can result in an out-of-bounds write. An attacker could leverage this vulnerability to execute arbitrary code in the context of the current process by convincing a user to open a malicious file.
Executive ViewAI
Rockwell Automation Arena Simulation contains a high-severity vulnerability that could allow attackers to execute code on engineering workstations through specially crafted simulation files. Manufacturing and engineering teams using Arena face risk of workstation compromise, intellectual property theft, and disruption to process modeling operations. While no active exploitation has been reported, this represents a credible threat given Arena's prevalent use in industrial design.
No vendor-released patch identified at time of analysis. Interim mitigations include: restricting Arena file opening to whitelisted directories and trusted users only; disabling file association handlers for Arena simulation files; deploying application monitoring to detect anomalous Arena process execution; enforcing principle of least privilege for Arena user accounts; and network segmentation to isolate Arena workstations from critical infrastructure systems.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
Memory corruption occurs when a program writes data beyond the boundaries of allocated memory regions or accesses memory in unintended ways, violating the integrity of the process's address space.
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
An arbitrary code execution vulnerability contained in Rockwell Automation's Arena Simulation software was reported that
An arbitrary code execution vulnerability contained in Rockwell Automation's Arena Simulation software was reported that
OpenForis Arena before 2019-05-07 allows SQL injection in the sorting feature. Rated critical severity (CVSS 9.8), this
Arbitrary code execution in Rockwell Automation Arena Simulation is possible through an out-of-bounds write in the siman
Arbitrary code execution in Rockwell Automation Arena Simulation is possible through an out-of-bounds write in the expmt
Arbitrary code execution in Rockwell Automation Arena Simulation is possible through an out-of-bounds write in the model
An arbitrary code execution vulnerability contained in Rockwell Automation's Arena Simulation software was reported that
A local code execution vulnerability exists in the Rockwell Automation Arena® due to a stack-based memory buffer overflo
A local code execution vulnerability exists in the Rockwell Automation Arena® due to a threat actor being able to read o
A local code execution vulnerability exists in the Rockwell Automation Arena® due to a stack-based memory buffer overflo
A local code execution vulnerability exists in the Rockwell Automation Arena® due to a threat actor being able to read o
A local code execution vulnerability exists in the Rockwell Automation Arena® due to a threat actor being able to read o
Exploit-DB