CVE-2026-36820
Description
Tenda W20E v15.11.0.6 suffers from a buffer overflow in formAddWebAuthWhiteUser, 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 suffers from a buffer overflow in formAddWebAuthWhiteUser, allowing DoS via crafted HTTP requests.
Vulnerability
A buffer overflow vulnerability exists in the formAddWebAuthWhiteUser function of Shenzhen Tenda Technology Co., Ltd Tenda W20E firmware version v15.11.0.6. The vulnerability is triggered by the webAuthWhiteUserInfo parameter, which is processed without proper bounds checking when copied using strncpy after locating a newline character. This affects firmware version v15.11.0.6 [1].
Exploitation
An attacker can exploit this vulnerability by sending a crafted HTTP request to the formAddWebAuthWhiteUser CGI endpoint. The request must include a webAuthWhiteUserInfo parameter with a value that is excessively long, containing a newline character followed by a large number of arbitrary characters, such as a*888 + '\n'*50 [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 inoperable [1].
Mitigation
Firmware version v15.11.0.6 is affected. The latest version mentioned is V16.01.0.6 [1]. Specific patch information or a fixed version release date is not yet disclosed in the available references.
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.