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Arena CVE-2026-8314

| EUVDEUVD-2026-43673 HIGH
Out-of-bounds Write (CWE-787)
2026-07-14 PSIRT@rockwellautomation.com GHSA-vm2h-v6v6-p7fc
7.0
CVSS 4.0 · Vendor: rockwellautomation
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Severity by source

Vendor (rockwellautomation) PRIMARY
7.0 HIGH
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from Vendor (rockwellautomation) · only source for this CVE.

CVSS VectorVendor: rockwellautomation

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
P
Scope
X

Lifecycle Timeline

2
Analysis Generated
Jul 14, 2026 - 13:34 vuln.today
CVE Published
Jul 14, 2026 - 13:19 cve.org
HIGH 7.0

DescriptionCVE.org

A security issue exists within Arena® Simulation due to a memory corruption vulnerability in the siman.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.

AnalysisAI

Arbitrary code execution in Rockwell Automation Arena Simulation is possible through an out-of-bounds write in the siman.exe (Siman) simulation-language component, which mishandles user-supplied data when parsing a model file. An attacker who convinces a user to open a crafted Arena file can run code in the context of that user's process. …

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Recommended ActionAI

Within 24 hours: conduct asset inventory of all Arena installations and identify user populations; restrict Arena model file transfers to authenticated internal sources only and notify all users not to open Arena files from external senders. …

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CVE-2026-8314 vulnerability details – vuln.today

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