CVE-2026-36822
Description
Tenda W20E v15.11.0.6 has a buffer overflow in formDelStaState via the macAddr parameter, leading to Denial of Service.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Tenda W20E v15.11.0.6 has a buffer overflow in formDelStaState via the macAddr parameter, leading to Denial of Service.
Vulnerability
A buffer overflow vulnerability exists in the formDelStaState function of Shenzhen Tenda Technology Co., Ltd Tenda W20E version 15.11.0.6. The vulnerability is triggered by the macAddr parameter, which is processed by websGetVar and subsequently used in memcpy without proper bounds checking. The vulnerable code path is reachable via a crafted HTTP request to the formDelStaState CGI endpoint [1].
Exploitation
An attacker can exploit this vulnerability by sending a crafted HTTP request to the formDelStaState CGI endpoint. The request must include a long string for the macAddr parameter, such as a*888 + ',' or longer. This crafted parameter will cause a buffer overflow when copied into a fixed-size buffer within the formDelStaState function [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 W20E router inoperable for legitimate users [1].
Mitigation
No patched version or specific mitigation details are available in the provided references. The latest version mentioned is V16.01.0.6, but it is not confirmed if this version addresses the vulnerability. Users are advised to check for official updates from Tenda Technology.
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.