CVE-2025-11779
Published: 02 December 2025
Description
Stack-based buffer overflow vulnerability in CircutorSGE-PLC1000/SGE-PLC50 v9.0.2. The 'SetLan' function is invoked when a new configuration is applied. This new configuration function is activated by a management web request, which can be invoked by a user when making changes to…
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the 'index.cgi' web application. The parameters are not being sanitised, which could lead to command injection.
Mitigating Controls (NIST 800-53 r5)AI
SI-10 requires validation of information inputs at defined points, directly preventing unsanitized parameters in the 'SetLan' function from causing buffer overflow or command injection via 'index.cgi' web requests.
SI-16 implements memory protections that safeguard against stack-based buffer overflows like the one in the 'SetLan' function, blocking unauthorized code execution from crafted inputs.
SI-2 mandates identification, reporting, testing, and deployment of fixes for system flaws, directly addressing this specific buffer overflow vulnerability through patching.
Security SummaryAI
CVE-2025-11779 is a stack-based buffer overflow vulnerability (CWE-121) in Circutor SGE-PLC1000 and SGE-PLC50 devices running version 9.0.2. The issue affects the 'SetLan' function, which is invoked during the application of new configurations triggered by management web requests to the 'index.cgi' web application. Parameters passed to this function are not sanitized, which could enable command injection.
The vulnerability has a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), indicating it is exploitable remotely over the network by unauthenticated attackers with low complexity and no user interaction required. An attacker could send a crafted request to the 'index.cgi' endpoint to trigger the vulnerable 'SetLan' function, resulting in stack buffer overflow and potential arbitrary command execution, compromising confidentiality, integrity, and availability with high impact.
Mitigation details are available in the INCIBE-CERT advisory on multiple vulnerabilities in Circutor products, accessible at https://www.incibe.es/en/incibe-cert/notices/aviso-sci/multiple-vulnerabilities-circutor-products-0.
Details
- CWE(s)
Affected Products
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Stack-based buffer overflow with command injection in public-facing web application (index.cgi) on network-exposed devices, enabling remote unauthenticated arbitrary command execution.