CVE-2026-36778 Details
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.
A stack-based buffer overflow vulnerability has been identified in the Tenda O3 Wireless Router, specifically in version 1.0.0.5(4180). The issue arises in the R7WebsSecurityHandler function, where user-controlled input in the username parameter is not properly validated or sanitized. This vulnerability can be exploited by sending a crafted HTTP request, causing a denial-of-service condition by crashing or rebooting the device. Additionally, this type of stack overflow could potentially be leveraged for arbitrary code execution.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 9, 2026CISA-ADP
Assessed Jun 10, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/xhh0124/SemVulLLM/tree/main/O3/R7WebsSecurityHandler | [email protected] | ExploitTechnical Analysis |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-121 | Stack-based Buffer Overflow | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| Shenzhen Tenda Technology Tenda O3 | 1.0.0.5(4180) |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 10, 2026 | CVE Modified | CISA-ADP |
| Jun 9, 2026 | New CVE Received | [email protected] |