What is CVE-2025-11781?

CVE-2025-11781 is a high-severity vulnerability in Circutor Sge-Plc1000, classified under Use of Hard-coded Cryptographic Key. CVSS score: 7.8/10. Published 2025-12-02.

How severe is CVE-2025-11781?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Circutor Sge-Plc1000

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.

EPSS: 0.001 (2.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Circutor Sge-plc1000
Circutor Sge-plc1000_firmware — versions 9.0.2
Circutor Sge-plc50
Circutor Sge-plc50_firmware — versions 9.0.2
Sge-plc1000 Sge-plc50 Circutor — versions 9.0.2

Weakness classification (CWE)

CWE-321 — Use of Hard-coded Cryptographic Key

References

cve-coordination@incibe.es (Third Party Advisory)

Frequently asked questions

What is CVE-2025-11781?: CVE-2025-11781 is a high-severity vulnerability in Circutor Sge-Plc1000, classified under Use of Hard-coded Cryptographic Key. CVSS score: 7.8/10. Published 2025-12-02.
How severe is CVE-2025-11781?: High severity. CVSS v3 base score is 7.8 out of 10.