CVE-2026-36777
Description
Tenda W3 Wireless Router v1.0.0.3(2204) has a stack overflow in formSetCfm, allowing DoS via crafted HTTP requests.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Tenda W3 Wireless Router v1.0.0.3(2204) has a stack overflow in formSetCfm, allowing DoS via crafted HTTP requests.
Vulnerability
A stack-based buffer overflow vulnerability exists in the formSetCfm function of Shenzhen Tenda Technology Co., Ltd Tenda W3 Wireless Router v1.0.0.3(2204). This issue is triggered when the funcname parameter is set to save_list_data, allowing user-controlled input via the param_1 parameter to be passed unsafely to sprintf, leading to an overflow. [1]
Exploitation
An attacker can exploit this vulnerability by sending a crafted HTTP request to the formSetCfm CGI endpoint. The request must include funcname set to save_list_data and an overly long value for the param_1 parameter. This allows the attacker to reach the vulnerable sprintf call. [1]
Impact
Successful exploitation of this vulnerability can lead to a Denial of Service (DoS) by causing the device to crash or reboot. The reference also suggests the potential for arbitrary code execution, though this is not explicitly detailed. [1]
Mitigation
No patch information or fixed version has been disclosed in the available references. Users are advised to check for firmware updates from Tenda. [1]
AI Insight generated on Jun 9, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
1- Range: = 1.0.0.3(2204)
Patches
0No patches discovered yet.
Vulnerability mechanics
No source-code context for this CVE — mechanics is only generated when we can read the actual fix diff. Without that, the four sections (root cause, attack vector, affected code, fix) would be speculation rather than analysis.
References
1News mentions
0No linked articles in our index yet.