CVE-2025-11781: sge-plc50 (CVSS 7.8)

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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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-321 CWE-321

Affected Products

Vendor	Product	Versions
circutor	sge-plc1000_firmware	All
circutor	sge-plc1000	All
circutor	sge-plc50_firmware	All
circutor	sge-plc50	All

References

Other References

https://www.incibe.es/en/incibe-cert/notices/aviso-sci/multiple-vulnerabilities-circutor-products-0

Frequently Asked Questions

What is CVE-2025-11781? +

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. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-11781? +

CVE-2025-11781 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-11781? +

CVE-2025-11781 affects products from circutor, specifically: sge-plc1000, sge-plc1000_firmware, sge-plc50, sge-plc50_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-11781? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2025-11781