CVE-2026-36791
Description
Tenda O3v3 v1.0.0.5 has a stack overflow in formSetCfm's save_list_data parameter, allowing DoS via crafted HTTP requests.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Tenda O3v3 v1.0.0.5 has a stack overflow in formSetCfm's save_list_data parameter, allowing DoS via crafted HTTP requests.
Vulnerability
A stack-based buffer overflow vulnerability exists in the save_list_data parameter within the formSetCfm function of Tenda O3v3 devices running firmware version v1.0.0.5. This overflow occurs because the sprintf function uses a tainted parameter param_1 without proper length checks when constructing a filename, making the vulnerability reachable when the funcname parameter is set to save_list_data [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 provide an overly long value for the funcpara1 parameter, triggering the buffer overflow [1].
Impact
Successful exploitation of this vulnerability can lead to a Denial of Service (DoS) by causing the device to crash or reboot. The references also suggest the potential for arbitrary code execution, although the primary disclosed impact is DoS [1].
Mitigation
No patched version or specific mitigation details have been disclosed in the available references. The vulnerability was publicly disclosed on 2026-06-06 [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
1Patches
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.