CVE-2026-36817
Description
Tenda W15E v15.11.0.10 has a buffer overflow in formAddWebAuthUser, allowing DoS via crafted HTTP requests.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Tenda W15E v15.11.0.10 has a buffer overflow in formAddWebAuthUser, allowing DoS via crafted HTTP requests.
Vulnerability
A buffer overflow vulnerability exists in the formAddWebAuthWhiteUser function of Tenda W15E firmware version v15.11.0.10. The vulnerability is triggered when processing the webAuthWhiteUserInfo parameter, which is retrieved using websGetVar. The strncpy function is used without proper bounds checking on the length of the input, leading to the overflow [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, for example, a string of approximately 500 or more characters followed by a newline character, causing strncpy to write beyond the allocated buffer [1].
Impact
Successful exploitation of this vulnerability can lead to a Denial of Service (DoS) condition. This may manifest as a process crash or general device instability, rendering the device inoperable for legitimate users [1].
Mitigation
As of the available references, a patched version or specific mitigation steps have not yet been disclosed. Users are advised to monitor official Tenda advisories for updates regarding this vulnerability [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
1- Tenda W15E: Ten Buffer Overflow Vulnerabilities Disclosed TogetherVypr Intelligence · Jun 9, 2026