CVE-2026-36821
Description
Tenda W20E v15.11.0.6 has a buffer overflow in formCropAndSetWewifiPic, allowing DoS via crafted HTTP requests.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Tenda W20E v15.11.0.6 has a buffer overflow in formCropAndSetWewifiPic, allowing DoS via crafted HTTP requests.
Vulnerability
A buffer overflow vulnerability exists in the formCropAndSetWewifiPic function of Shenzhen Tenda Technology Co., Ltd Tenda W20E version 15.11.0.6. The vulnerability is triggered when the picCropName parameter, influenced by a user, is processed by websGetVar and subsequently used in a sprintf command, leading to a buffer overflow. The vulnerable path is directly reachable [1].
Exploitation
An attacker can exploit this vulnerability by sending a crafted HTTP request to the formCropAndSetWewifiPic CGI endpoint. The request must include a picCropName parameter with a value exceeding a certain length, such as a*888 or more, to trigger the buffer overflow [1].
Impact
Successful exploitation of this vulnerability can lead to a Denial of Service (DoS) condition. This may manifest as a process crash or device instability, rendering the affected device unusable [1].
Mitigation
No patched version or specific mitigation details are available in the provided references. The latest version mentioned is V16.01.0.6 [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.