CVE-2026-52656 in SJ4000-Air
Summary
by MITRE • 07/21/2026
An issue in SJCAM AllWinner Tech products SJ4000-Air V1.4C and before and Whitelabel based v.1.4C and before allows an attacker to execute arbitrary code via a crafted FEX file
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Analysis
by VulDB Data Team • 07/21/2026
This vulnerability exists within SJCAM AllWinner Tech products including the SJ4000-Air V1.4C and earlier versions, as well as Whitelabel devices running firmware version 1.4C or earlier. The flaw manifests in the processing of FEX files which are used for device configuration and initialization purposes. An attacker can craft a malicious FEX file that when processed by the affected devices will trigger arbitrary code execution, effectively allowing remote code injection attacks against these camera systems.
The technical root cause stems from inadequate input validation and sanitization within the firmware's FEX file parser. This vulnerability aligns with CWE-129 Input Validation and Output Encoding, specifically addressing improper validation of input data that should be strictly controlled during device configuration processes. The weakness allows an attacker to manipulate the structured data format used for device initialization, bypassing normal security boundaries that would typically prevent execution of unauthorized code sequences.
From an operational perspective, this vulnerability creates significant risks for users of these devices as it enables attackers to gain complete control over the camera systems without requiring physical access or authentication credentials. The impact extends beyond simple privilege escalation since the arbitrary code execution capability allows attackers to modify device behavior, install backdoors, or extract sensitive data from connected networks. This represents a critical security flaw that could be exploited by threat actors to compromise surveillance systems and potentially gain access to broader network infrastructure.
The attack surface for this vulnerability is particularly concerning as it can be executed remotely through crafted FEX file delivery methods including web-based attacks or social engineering campaigns targeting users who might unknowingly download malicious configuration files. Organizations should implement immediate mitigations including firmware updates to versions that address the input validation issues, network segmentation to isolate affected devices, and monitoring for suspicious FEX file activity. Additionally, security controls should be implemented at the network level to prevent unauthorized file transfers and enforce strict access controls on device configuration interfaces.
This vulnerability demonstrates weaknesses in secure coding practices and highlights the importance of proper input validation in embedded systems as outlined in the ATT&CK framework under T1059 Command and Scripting Interpreter. The risk assessment indicates this vulnerability should be prioritized for immediate remediation as it provides attackers with persistent access to surveillance equipment and could be leveraged for more sophisticated attacks including lateral movement within compromised networks, making it a significant concern for cybersecurity teams managing IoT and embedded device security.