CVE-2026-36806
Description
Tenda W15E v15.11.0.10 firmware contains a buffer overflow in formModifyWebAuthUser, 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 firmware contains a buffer overflow in formModifyWebAuthUser, allowing DoS via crafted HTTP requests.
Vulnerability
A buffer overflow vulnerability exists in the formModifyWebAuthUser function of Shenzhen Tenda Technology Co., Ltd Tenda W15E firmware version v15.11.0.10. The vulnerability is triggered when the webAuthUserPwd parameter, along with webAuthUser, is used in a sprintf command without proper bounds checking, specifically when these parameters are not null [1].
Exploitation
An attacker can exploit this vulnerability by sending a crafted HTTP request to the formModifyWebAuthUser CGI endpoint. The request must include parameters such as WebAuthUserIndex, webAuthUser, and webAuthUserPwd. By providing an excessively long value for webAuthUserPwd (e.g., a*888 or more), the buffer overflow can be triggered [1].
Impact
Successful exploitation of this vulnerability results in a Denial of Service (DoS) condition. This can manifest as a process crash or device instability, rendering the Tenda W15E router inoperable for legitimate users [1].
Mitigation
No specific patched version or mitigation details are available in the provided 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
1- Tenda W15E: Ten Buffer Overflow Vulnerabilities Disclosed TogetherVypr Intelligence · Jun 9, 2026