Use of hardcoded cryptographic keys in Circutor SGE-PLC1000/SGE-PLC50
Summary
| CVE | CVE-2025-11781 |
|---|---|
| State | PUBLISHED |
| Assigner | INCIBE |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-12-02 13:15:49 UTC |
| Updated | 2026-09-26 00:10:00 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 8.6 HIGH from [email protected]
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/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
EPSS: 0.001380000 probability, percentile 0.026090000 (date 2026-09-27)
Problem Types: CWE-321 | CWE-321 CWE-321: Use of Hard-coded Cryptographic Key
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 8.6 | HIGH | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/C... |
| 4.0 | CNA | CVSS | 8.6 | HIGH | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| 3.1 | [email protected] | Primary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v4.0 Breakdown
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/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
CVSS v3.1 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Hardware | Circutor | Sge-plc1000 | - | All | All | All |
| Operating System | Circutor | Sge-plc1000 Firmware | 9.0.2 | All | All | All |
| Hardware | Circutor | Sge-plc50 | - | All | All | All |
| Operating System | Circutor | Sge-plc50 Firmware | 9.0.2 | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | SGE-PLC1000 SGE-PLC50 | Circutor | affected 9.0.2 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.incibe.es/en/incibe-cert/notices/aviso-sci/multiple-vulnerabilities-cir... | [email protected] | www.incibe.es | Third Party Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Gabriel Gonzalez and Sergio Ruiz (en)
Additional Advisory Data
Solutions
CNA: The SGE-PLC100 and SGE-PLC50 units were discontinued in 2015. They were replaced by the Compact DC, which in turn became obsolete in November 2024. The current equivalent product is the GEDE EDC. The oldest version currently installed is 1.0.14, as it was the first to be compatible with the existing tariff system, while the latest version of these units is 1.2.21. Circutor recommends not extending the useful life of the SGE-PLC100 and SGE-PLC50 concentrators without keeping them updated. For both the Compact DC units (which replaced the SGE series) and the current GEDE EDC, it is recommended to update to the latest available version (2.0.4) or, at a minimum, to 2.0.0. This approach not only mitigates the identified vulnerabilities, but also provides new functionalities derived from the evolution of DLMS, the PRIME standard, STG protocols and the REST API.