Description

Stack overflow vulnerabilities exist in an API endpoint of AOS-CX. Successful exploitation could allow an authenticated malicious actor to cause a denial-of-service condition on the affected system.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "4.9",
  "pubDate": "2026-09-01T21:18:45.160Z",
  "pubdate": "2026-09-01T21:18:45.160Z",
  "executiveSummary": "A stack-based buffer overflow vulnerability has been identified within an API endpoint of the AOS-CX network operating system.\nThe vulnerability allows an authenticated attacker to trigger memory corruption, resulting in a denial-of-service (DoS) condition by crashing the affected service or the underlying system process.\nSuccessful exploitation requires the attacker to possess authenticated access to the target device, potentially via the management interface.\nThe risk is primarily centered on system availability; by injecting malformed data into a vulnerable API call, an attacker can destabilize critical network infrastructure management functions.\nThere is no indication of remote code execution capability within the provided scope; however, the vulnerability poses a significant risk to operational continuity for organizations relying on AOS-CX for network orchestration.",
  "technicalDetails": "The vulnerability originates from inadequate bounds checking within an API endpoint of the AOS-CX operating system. When the API processes user-supplied input, a failure to validate the length of the data against the allocated stack buffer leads to a memory corruption scenario.\nExploitation involves an authenticated actor crafting a specifically malformed request containing an oversized payload directed at the vulnerable API endpoint. As the target function processes this input, the data exceeds the boundaries of the local stack frame, overwriting adjacent memory space. This typically includes the saved return pointer or other critical control flow data structures.\nUpon reaching the return instruction of the function, the corrupted control data causes the process to jump to an invalid memory location or trigger an exception, leading to an immediate process crash or system-wide denial-of-service.\nThe attack flow follows these steps: 1) The attacker establishes an authenticated session with the AOS-CX management interface. 2) The attacker identifies the vulnerable API endpoint and constructs a payload designed to exceed the fixed-size buffer associated with the input processing function. 3) The attacker transmits the malformed request via the API. 4) The application fails to sanitize the input size, resulting in a stack overflow. 5) The process encounters a memory violation, leading to service termination and loss of management access or functional capability for the affected module.\nBecause this vulnerability resides within an API component, the exposure is limited to actors who have successfully bypassed initial authentication controls. Once inside, the attacker can leverage the lack of input validation to impact the availability of the device. The post-exploitation impact is limited to service interruption, as the stack corruption results in a crash rather than controlled code execution in this specific context."
}