CVE-2026-27552 in ICE2-8IOL1-G65L-V1D
Summary
by MITRE • 09/16/2026
A low-privileged remote attacker can exploit improper authorization in the /index.php/attached_devices_tab/do_upload endpoint to upload IODD files to the device, potentially altering device behavior or causing system crashes.
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Analysis
by VulDB Data Team • 09/16/2026
The vulnerability identified involves a critical flaw in access control mechanisms within the web interface of networked industrial devices, specifically targeting the do_upload function associated with attached device configuration management. This security weakness allows an attacker operating at a low privilege level to bypass intended authorization checks and execute file upload operations that should be restricted to administrative users only. The core technical issue stems from improper verification of user permissions before processing incoming data requests, which is a classic example of Broken Access Control as defined by the Common Weakness Enumeration (CWE-269). By exploiting this gap in authentication logic, an adversary can interact with internal system endpoints that are not meant to be accessible without elevated credentials.
The specific attack vector leverages the /index.php/attached_devices_tab/do_upload endpoint, which is designed to handle the ingestion of IODD files for configuring connected industrial devices. IODD stands for IO Device Description and serves as a standardized XML-based format used in Industrial Ethernet networks such as PROFINET or EtherNet/IP to describe device capabilities and parameters. When an attacker successfully uploads a maliciously crafted IODD file, they can inject malformed data structures that the target system fails to validate properly against expected schemas or length constraints. This lack of rigorous input validation on files uploaded through this specific pathway creates conditions ripe for exploitation beyond simple unauthorized access.
The operational impact of exploiting this vulnerability is severe and multifaceted. First, the ability to alter device behavior means an attacker can manipulate how industrial equipment operates within a networked environment. By modifying parameters defined in the IODD file, it may be possible to change communication settings, safety limits, or operational modes without detection by standard monitoring tools. Second, the potential for causing system crashes indicates that malformed input triggers unhandled exceptions or memory corruption events within the device firmware or web server software. This denial of service capability disrupts industrial operations and can lead to significant downtime in critical infrastructure environments where continuous operation is paramount.
From a threat intelligence perspective, this vulnerability aligns with ATT&CK techniques related to Initial Access via Valid Accounts if low-privilege credentials are compromised, followed by Defense Evasion through manipulation of configuration files. The exploitation chain typically involves authenticating as a standard user, navigating to the device management interface, and submitting the crafted IODD payload. Because industrial control systems often rely on legacy protocols and interfaces that were not designed with modern security assumptions in mind, such flaws are particularly dangerous. They allow lateral movement or persistent backdoors if the uploaded files contain executable components disguised as configuration data, although the primary risk here centers on behavioral alteration and stability disruption.
Mitigation strategies must address both immediate remediation and long-term architectural improvements. Immediate actions should include applying vendor-provided patches that enforce strict role-based access control on all file upload endpoints. If patching is not immediately feasible, network segmentation can isolate vulnerable devices from untrusted networks, restricting access to the management interface only through secure administrative channels. Additionally, implementing Web Application Firewalls with rules specifically targeting malformed IODD structures or unauthorized API calls can provide a layer of defense-in-depth. Organizations should also audit their current user privilege assignments to ensure that no low-privileged accounts have unnecessary write permissions on configuration endpoints. Regular vulnerability assessments focusing on industrial protocol handlers and web interfaces are essential to identify similar misconfigurations before they can be exploited by malicious actors seeking to disrupt critical operations or steal sensitive operational data.