CVE-2025-11781
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-02

Last updated on: 2025-12-03

Assigner: Spanish National Cybersecurity Institute, S.A. (INCIBE)

Description
Use of hardcoded cryptographic keys in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. The affected firmware contains a hardcoded static authentication key. An attacker with local access to the device can extract this key (e.g., by analysing the firmware image or memory dump) and create valid firmware update packages. This bypasses all intended access controls and grants full administrative privileges.
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Meta Information
Published
2025-12-02
Last Modified
2025-12-03
Generated
2026-06-16
AI Q&A
2025-12-02
EPSS Evaluated
2026-06-15
NVD
CVE-2025-11781
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
circutor sge-plc1000_firmware 9.0.2
circutor sge-plc1000 *
circutor sge-plc50_firmware 9.0.2
circutor sge-plc50 *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-321 The product uses a hard-coded, unchangeable cryptographic key.
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Executive Summary

This vulnerability involves the use of hardcoded cryptographic keys in Circutor SGE-PLC1000/SGE-PLC50 devices running firmware version 9.0.2. The firmware contains a static authentication key embedded in the code. An attacker with local access to the device can extract this key by analyzing the firmware image or memory dump. With this key, the attacker can create valid firmware update packages, bypassing all access controls and gaining full administrative privileges on the device.

Impact Analysis

If exploited, this vulnerability allows an attacker with local access to gain full administrative control over the affected device. This means the attacker can install malicious firmware updates, potentially disrupting device operation, stealing sensitive data, or using the device as a foothold for further attacks within the network.

Mitigation Strategies

The affected Circutor SGE-PLC1000/SGE-PLC50 devices are discontinued since 2015 and have been replaced by newer models (Compact DC and currently GEDE EDC). The recommended mitigation is to update the firmware to version 2.0.0 or later, which addresses this and other vulnerabilities. [1]

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