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CVE-2025-11783: Stack-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-02 · updated 2026-09-26
• Weakness: CWE-121

Description

Stack-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. The vulnerability is found in the 'AddEvent()' function when copying the user-controlled username input to a fixed-size buffer (48 bytes) without boundary checking. This can lead to memory corruption, resulting in possible remote code execution.

Affected products

• Circutor SGE-PLC1000: 9.0.2
• CIRCUTOR Sge-Plc50 Firmware: 9.0.2

References

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

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