CVE-2026-0840 in 进取 520W
Summary
by MITRE • 01/11/2026
A security vulnerability has been detected in UTT 进取 520W 1.7.7-180627. Affected by this vulnerability is the function strcpy of the file /goform/formConfigNoticeConfig. The manipulation of the argument timestart leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 01/12/2026
This vulnerability resides within the UTT 进取 520W device firmware version 1.7.7-180627, specifically targeting the formConfigNoticeConfig functionality located at /goform/formConfigNoticeConfig. The flaw manifests through improper input validation in the strcpy function where the timestart parameter serves as the attack vector. This represents a classic buffer overflow condition that occurs when user-supplied data exceeds the allocated buffer space, creating potential for arbitrary code execution or system compromise. The vulnerability's remote exploitability means attackers can leverage this flaw without physical access to the device, making it particularly concerning for network-connected IoT systems.
The technical implementation of this vulnerability stems from the insecure use of strcpy function which lacks bounds checking mechanisms. When the timestart argument is processed, it is directly copied into a fixed-size buffer without proper validation of input length. This creates a predictable buffer overflow scenario where an attacker can overwrite adjacent memory locations, potentially corrupting program execution flow or injecting malicious code. The CWE-121 category applies here as this represents a classic stack-based buffer overflow vulnerability. Attackers can manipulate the timestart parameter to exceed buffer boundaries, leading to potential privilege escalation or denial of service conditions.
The operational impact of this vulnerability extends beyond simple exploitation as it affects the device's core configuration management functionality. Since this is a remote exploit, adversaries can compromise the device from anywhere on the network, potentially gaining unauthorized access to sensitive system information or using the device as a pivot point for further attacks. The public disclosure of the exploit increases the risk profile significantly as malicious actors can readily implement the attack without requiring advanced technical skills. This vulnerability directly impacts the device's integrity and confidentiality, potentially allowing attackers to modify system configurations or extract sensitive data. The lack of vendor response to early disclosure attempts creates a dangerous precedent where critical vulnerabilities remain unpatched for extended periods.
Organizations should immediately implement network segmentation and access controls to limit exposure to this vulnerability. The recommended mitigations include disabling remote management features where possible, implementing network monitoring to detect exploitation attempts, and applying any available firmware updates from the vendor despite their lack of response. The ATT&CK framework's T1210 technique applies here as this vulnerability enables exploitation of remote services through buffer overflow attacks. Additionally, implementing input validation controls and using safer string handling functions like strlcpy or strncpy would provide immediate protection against similar vulnerabilities. Regular security assessments and vulnerability scanning should be conducted to identify other potential buffer overflow conditions in the device's firmware. The absence of vendor response underscores the importance of maintaining independent security research and public disclosure practices to ensure timely remediation of critical security flaws.