CVE-2026-36778

MEDIUM

Tenda O3 Wireless Router 1.0.0.5(4180) - Denial of Service via R7WebsSecurityHandler Username Parameter

Title source: llm

Description

Shenzhen Tenda Technology Co., Ltd Tenda O3 Wireless Router v1.0.0.5(4180) was discovered to contain a stack overflow in the username parameter of the R7WebsSecurityHandler function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.

References (1)

Core 1

Core References

https://github.com/xhh0124/SemVulLLM/tree/main/O3/R7WebsSecurityHandler

View Writeup ZIP pw:eip

Scores

CVSS v3 4.9

EPSS 0.0037

EPSS Percentile 28.6%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-121

Status published

Published Jun 09, 2026

Tracked Since Jun 10, 2026