CVE-2026-43833 in ADAM-3600 EdgeLink
Summary
by MITRE • 07/31/2026
Successful exploitation of the vulnerability could allow an authenticated attacker to exploit a stack-based buffer overflow in the upload functionality to conduct code execution.
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Analysis
by VulDB Data Team • 07/31/2026
A stack-based buffer overflow vulnerability in the file upload functionality represents a critical security weakness that enables authenticated attackers to execute arbitrary code on the target system. This type of vulnerability occurs when an application fails to properly validate or limit the size of data being written to a fixed-length memory buffer allocated on the stack. The flaw typically manifests when user-supplied input containing malicious data is processed through the upload mechanism without adequate bounds checking, allowing an attacker to overwrite adjacent memory locations including return addresses and function pointers.
The technical exploitation requires an authenticated session to access the upload functionality, which reduces the attack surface but does not eliminate the severity of the vulnerability. Attackers can craft specially formatted payloads that exceed the allocated buffer size, causing a stack overflow condition that can be leveraged to redirect program execution flow. This technique falls under the common weakness enumeration CWE-121 which specifically addresses stack-based buffer overflow conditions. The operational impact extends beyond simple code execution as successful exploitation can lead to complete system compromise, data exfiltration, and persistence mechanisms within the affected environment.
From an adversarial perspective, this vulnerability aligns with attack patterns documented in the ATT&CK framework under technique T1059 for command and script injection, where attackers leverage legitimate system processes to execute malicious code. The authenticated requirement means that attackers must first obtain valid credentials or exploit another vulnerability to gain access to a legitimate user account before targeting this specific flaw. Security controls such as stack canaries, address space layout randomization, and non-executable stack protections may provide partial defense but are often insufficient against sophisticated exploitation techniques.
Organizations should implement comprehensive mitigations including strict input validation, size limitations on uploaded files, proper memory management practices, and regular security testing of upload functionalities. The vulnerability demonstrates the importance of following secure coding practices as outlined in OWASP Top Ten and other industry standards that emphasize the need for robust input sanitization and boundary checking. Regular security assessments and penetration testing should specifically target file upload mechanisms to identify similar buffer overflow conditions that could provide attackers with unauthorized code execution capabilities.