CVE-2025-11781
CVE-2025-11781 is a high-severity vulnerability in Circutor Sge-plc1000 Firmware with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-321.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- CVSS v4: 8.6
- EPSS exploit prediction: 0% (3rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-200235
- Weakness: CWE-321
- Affected product: Circutor Sge-plc1000 Firmware
- Published:
- Last modified:
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.
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.
- How severe is CVE-2025-11781?
- CVE-2025-11781 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2025-11781 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-11781?
- CVE-2025-11781 primarily affects Circutor Sge-plc1000 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2025-11781?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-11781 have an EU (EUVD) identifier?
- Yes. CVE-2025-11781 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-200235.
- When was CVE-2025-11781 published?
- CVE-2025-11781 was published on 2025-12-02 and last updated on 2026-06-17.
References
Affected products (2)
- cpe:2.3:o:circutor:sge-plc1000_firmware:9.0.2:*:*:*:*:*:*:*
- cpe:2.3:o:circutor:sge-plc50_firmware:9.0.2:*:*:*:*:*:*:*
More vulnerabilities in Circutor Sge-plc1000 Firmware
- CVE-2021-33841 — Critical (CVSS 10.0): SGE-PLC1000 device, in its 0.9.2b firmware version, does not handle some requests correctly, allowing a remote attacker…
- CVE-2025-11788 — Critical (CVSS 9.8): Heap-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. In the 'ShowSupervisorParameters()'…
- CVE-2025-11786 — Critical (CVSS 9.8): Stack-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. In the 'SetUserPassword()'…
- CVE-2025-11785 — Critical (CVSS 9.8): Stack-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. In the 'ShowMeterPasswords()'…
- CVE-2025-11784 — Critical (CVSS 9.8): Stack-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. In the 'ShowMeterDatabase()'…
- CVE-2025-11783 — Critical (CVSS 9.8): Stack-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. The vulnerability is found in the…
All CVEs affecting Circutor Sge-plc1000 Firmware →
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