Stack-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. In the 'ShowMeterDatabase()' function, there is an unlimited user...
Description
Stack-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. In the 'ShowMeterDatabase()' function, there is an unlimited user input that is copied to a fixed-size buffer via 'sprintf()'. The 'GetParameter(meter)' function retrieves the user input, which is directly incorporated into a buffer without size validation. An attacker can provide an excessively large input for the 'meter' parameter.
AI Analyst Comment
Remediation
Update Unknown Multiple Products to the latest version. Monitor for exploitation attempts and review access logs.
Executive Summary:
A critical stack-based buffer overflow vulnerability, identified as CVE-2025-11784, exists in multiple products, including Circutor SGE-PLC devices. The flaw allows an unauthenticated attacker to execute arbitrary code or cause a denial of service by sending a specially crafted, overly long input to a specific function. Due to its critical severity rating (CVSS 9.8), successful exploitation could lead to a complete compromise of the affected industrial control systems.
Vulnerability Details
CVE-ID: CVE-2025-11784
Affected Software: Circutor SGE-PLC1000, Circutor SGE-PLC50, and potentially other products.
Affected Versions: Version 9.0.2 is confirmed vulnerable. See vendor advisory for a complete list of affected versions.
Vulnerability: This is a classic stack-based buffer overflow vulnerability. The
ShowMeterDatabase()function retrieves user-supplied input for a parameter named 'meter' via theGetParameter()function. This input is then copied into a fixed-size buffer on the stack using thesprintf()function without any prior validation of its length. An attacker can exploit this by providing an input string for the 'meter' parameter that is longer than the buffer's allocated size, thereby overwriting adjacent memory on the stack, including the function's return address. This can be leveraged to achieve arbitrary code execution or cause the application to crash, resulting in a denial-of-service condition.Business Impact
This vulnerability presents a critical risk to the organization, reflected by its CVSS score of 9.8. Successful exploitation could allow an attacker to achieve remote code execution (RCE) on the affected Programmable Logic Controller (PLC). This would grant the attacker complete control over the device, potentially leading to the disruption of critical industrial processes, manipulation of operational data, theft of sensitive information, or lateral movement into the broader operational technology (OT) network. A simpler denial-of-service attack could crash the device, causing operational downtime, production loss, and potential safety hazards depending on the process being controlled.
Remediation Plan
Immediate Action: Immediately apply the vendor-supplied security patches to update all affected Circutor SGE-PLC1000/SGE-PLC50 devices and any other impacted products to the latest, non-vulnerable version. After patching, closely monitor system and application logs for any signs of exploitation attempts that may have occurred prior to remediation.
Proactive Monitoring:
ShowMeterDatabase()function containing unusually long values for the 'meter' parameter. Monitor system logs for unexpected application crashes or device reboots.Compensating Controls:
If immediate patching is not feasible, implement the following controls to reduce risk:
Exploitation Status
Public Exploit Available: false
Analyst Notes: As of December 2, 2025, there are no known public exploits or reports of active exploitation in the wild for this vulnerability. However, given the critical CVSS score and the straightforward nature of a stack-based buffer overflow, it is highly likely that proof-of-concept exploits will be developed by security researchers and threat actors. This vulnerability is not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog.
Analyst Recommendation
Given the critical severity of this vulnerability and its potential impact on critical operational technology, organizations must prioritize patching all affected systems immediately. This vulnerability represents a significant and urgent threat that could lead to the complete compromise of industrial control systems. If patching must be delayed, the compensating controls outlined above, particularly network segmentation and strict access control, should be implemented without delay to mitigate the risk of exploitation. The high CVSS score indicates a high likelihood of future exploitation, so swift and decisive action is required to protect critical assets.