CVE-2026-0838 in 进取 520W
Summary
by MITRE • 01/11/2026
A security flaw has been discovered in UTT 进取 520W 1.7.7-180627. This impacts the function strcpy of the file /goform/ConfigWirelessBase. Performing a manipulation of the argument ssid results in buffer overflow. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. 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
The vulnerability identified as CVE-2026-0838 represents a critical buffer overflow flaw within the UTT 进取 520W wireless access point firmware version 1.7.7-180627. This security weakness resides in the /goform/ConfigWirelessBase file where the strcpy function is improperly utilized, creating an exploitable condition that allows remote attackers to manipulate the ssid parameter argument. The flaw demonstrates characteristics of CWE-121, which specifically addresses stack-based buffer overflow conditions where insufficient bounds checking permits attackers to overwrite adjacent memory locations. The vulnerability's remote exploitability means that threat actors can potentially compromise affected devices without requiring physical access or local network presence.
The technical implementation of this vulnerability stems from the insecure use of the strcpy function which does not perform bounds checking on the input data. When an attacker supplies a specially crafted ssid parameter exceeding the allocated buffer size, the function will overwrite adjacent memory locations including potentially critical program control structures. This type of vulnerability falls under the ATT&CK technique T1203, which encompasses the exploitation of software vulnerabilities for privilege escalation and system compromise. The buffer overflow can potentially lead to arbitrary code execution, denial of service conditions, or complete system takeover depending on the memory layout and protection mechanisms in place.
The operational impact of this vulnerability extends beyond simple exploitation as it affects a widely deployed wireless access point model that likely serves numerous enterprise and residential networks. The fact that public exploits have been released significantly increases the risk surface for affected organizations, as the attack surface is no longer limited to sophisticated threat actors but now includes script kiddies and automated attack tools. The vendor's lack of response to early disclosure attempts creates a particularly concerning scenario where affected parties have no official patch or mitigation guidance available, leaving networks vulnerable to exploitation. This delay in vendor response aligns with ATT&CK tactic T1588, which covers the exploitation of vulnerabilities with limited vendor remediation timelines.
Organizations utilizing affected UTT 进取 520W devices should immediately implement network segmentation to isolate these vulnerable access points from critical network infrastructure and establish monitoring for suspicious network traffic patterns that may indicate exploitation attempts. Network administrators should also consider implementing intrusion detection systems with signature-based detection for known exploit patterns targeting this specific vulnerability. The recommended mitigation strategy includes immediate firmware updates from the vendor once available, though the lack of vendor response necessitates alternative approaches such as network-based firewalls to block access to the vulnerable /goform/ConfigWirelessBase endpoint. Additionally, implementing input validation controls at network boundaries and conducting thorough network assessments to identify all affected devices will help reduce the overall risk exposure. The vulnerability's classification as a remote code execution threat requires organizations to treat it with the highest priority and implement comprehensive security controls to protect their wireless infrastructure.