Executive Summary

This vulnerability is a stack-based buffer overflow in Circutor SGE-PLC1000/SGE-PLC50 version 9.0.2. It occurs in the 'ShowDownload()' function, which uses sprintf() to format a string including user-controlled input from 'GetParameter(meter)' into a fixed-size 64-byte buffer without checking the input length. An attacker can exploit this by providing an excessively long 'meter' parameter value, causing the buffer to overflow and potentially leading to memory corruption.

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Impact Analysis

The buffer overflow can lead to memory corruption, which may allow an attacker to execute arbitrary code, crash the device, or cause denial of service. Since the vulnerability involves user-controlled input without proper length checks, it can be exploited to compromise the affected Circutor devices, potentially disrupting electricity network management functions.

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Mitigation Strategies

The affected Circutor SGE-PLC1000/SGE-PLC50 devices are discontinued since 2015 and have been replaced by newer models (Compact DC and GEDE EDC). It is recommended to update to firmware versions 2.0.0 or later to mitigate vulnerabilities in these devices. Since CVE-2025-11782 involves unsafe use of sprintf() leading to buffer overflow, applying firmware updates or replacing the device with supported models is the immediate mitigation step. [1]

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