CVE-2026-10183 in TEW-432BRP
Summary
by MITRE • 05/31/2026
A vulnerability was identified in TRENDnet TEW-432BRP 3.10B20. This affects the function formWlanSetup of the file /goform/formWlanSetup. The manipulation of the argument enrollee leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit is publicly available and might be used. The vendor explains: "This product has been EOL for 15 years (since 2009). As the item has been EOL for such a long time, we are not able to replicate or fix any vulnerabilities." This vulnerability only affects products that are no longer supported by the maintainer.
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Analysis
by VulDB Data Team • 05/31/2026
This vulnerability exists in the TRENDnet TEW-432BRP wireless router model running firmware version 3.10B20 and represents a critical stack-based buffer overflow flaw within the web interface administration functionality. The specific vulnerable function formWlanSetup located in the /goform/formWlanSetup file processes user input through the enrollee argument without proper bounds checking, creating an exploitable condition that allows attackers to overwrite adjacent memory locations on the stack. This type of vulnerability falls under CWE-121 which specifically addresses stack-based buffer overflow conditions where insufficient bounds checking permits writing beyond the allocated buffer space, potentially leading to arbitrary code execution or system crashes.
The attack vector for this vulnerability is remotely accessible through the web-based management interface of the router, making it particularly dangerous as it requires no physical access or local network presence to exploit. The publicly available exploit demonstrates that this vulnerability has been actively weaponized in the wild, representing a significant risk to organizations that may still be operating legacy equipment. The exploitation process involves crafting malicious input to the enrollee parameter that exceeds the buffer capacity, causing a stack overflow that can be leveraged to redirect program execution flow or inject malicious code into the router's memory space.
The operational impact of this vulnerability extends beyond simple system instability as it provides potential attackers with complete control over the affected device. Once exploited, attackers could gain persistent access to the network through the compromised router, potentially using it as a pivot point for further attacks within the local network or as a command and control server. This vulnerability directly maps to several attack techniques described in the MITRE ATT&CK framework, particularly those involving privilege escalation and lateral movement through compromised network devices. The router's role as a network gateway makes it an attractive target for attackers seeking to establish persistent presence within an organization's infrastructure.
Given that TRENDnet has officially declared the product end-of-life since 2009, no security patches or firmware updates are available to address this vulnerability. This situation creates a particularly concerning scenario where organizations must either replace the affected hardware or implement network segmentation to isolate these devices from critical systems. The vendor's statement regarding inability to provide fixes due to extended end-of-life status aligns with industry practices where manufacturers cease support for products after 10-15 years, but leaves organizations with legacy equipment vulnerable to known exploits. Organizations should immediately assess their network inventory for similar legacy devices and implement network monitoring to detect potential exploitation attempts, while developing a timeline for hardware replacement to eliminate these persistent security risks.