# CVE-2025-11781: Use of hardcoded cryptographic keys in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. The affected firmware contains a…

Source: https://junglewise.ai/threats/cve-2025-11781-use-of-hardcoded-cryptographic-keys-in-circutor-sge-plc1000-sge  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-02  
License: CC BY 4.0 with a link back

CVE-2025-11781 · Severity: high · CVSS 7.8 · Published 2025-12-02

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.

Technologies: [Circutor Sge-Plc1000](https://junglewise.ai/threats/technologies/sge-plc1000), [Circutor Sge-Plc1000 Firmware](https://junglewise.ai/threats/technologies/sge-plc1000-firmware), [Circutor Sge-Plc50](https://junglewise.ai/threats/technologies/sge-plc50), [Circutor Sge-Plc50 Firmware](https://junglewise.ai/threats/technologies/sge-plc50-firmware). Vendors: [Circutor](https://junglewise.ai/threats/vendors/circutor).

## Quick answers

**Is CVE-2025-11781 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-11781 being exploited in the wild.

**How severe is CVE-2025-11781?** High severity, with a CVSS score of 7.8, published 2 December 2025.

**Which products and versions are affected?** Circutor Sge-Plc1000, Circutor Sge-Plc1000 Firmware, Circutor Sge-Plc50, Circutor Sge-Plc50 Firmware. The advisory does not name versions.

**Is there a fix for CVE-2025-11781?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-11781?** Check whether you run Circutor Sge-Plc1000, Circutor Sge-Plc1000 Firmware, Circutor Sge-Plc50 or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Circutor Sge-Plc1000
- Circutor Sge-Plc1000 Firmware
- Circutor Sge-Plc50
- Circutor Sge-Plc50 Firmware

## Related threats

- [Out-of-bounds read vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. The 'DownloadFile' function converts a…](https://junglewise.ai/threats/cve-2025-11789-out-of-bounds-read-vulnerability-in-circutor-sge-plc1000-sge)
- [Heap-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. In the 'ShowSupervisorParameters()'…](https://junglewise.ai/threats/cve-2025-11788-heap-based-buffer-overflow-vulnerability-in-circutor-sge-plc1000)
- [Command injection vulnerability in the operating system in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2 through the 'GetDNS()', 'CheckPing()' and '](https://junglewise.ai/threats/cve-2025-11787-command-injection-vulnerability-in-the-operating-system-in)
- [Stack-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. In the 'SetUserPassword()'…](https://junglewise.ai/threats/cve-2025-11786-stack-based-buffer-overflow-vulnerability-in-circutor-sge-plc1000)
- [Stack-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. In the 'ShowMeterDatabase()'…](https://junglewise.ai/threats/cve-2025-11784-stack-based-buffer-overflow-vulnerability-in-circutor-sge-plc1000)