CVE-2026-3974 Details
Description
A vulnerability was identified in Tenda W3 1.0.0.3(2204). This vulnerability affects the function formexeCommand of the file /goform/exeCommand of the component HTTP Handler. Such manipulation of the argument cmdinput leads to stack-based buffer overflow. The attack may be performed from remote. The exploit is publicly available and might be used.
A stack-based buffer overflow vulnerability has been identified in the Tenda W3 router, specifically in version 1.0.0.3(2204). The issue arises in the HTTP command execution handler, within the 'formexeCommand' function of the '/goform/exeCommand' file. The vulnerability is triggered by manipulating the 'cmdinput' parameter, which is copied into a fixed-length stack buffer without proper length validation. This oversight allows an attacker to overwrite the stack with excessively long input, potentially leading to a crash and enabling code execution within the HTTP daemon process. The vulnerability can be exploited remotely, and a public exploit is available.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 12, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/Svigo-o/Tenda_vul/tree/main/tenda-w3-formexeCommand-cmdinput-buffer-overflow | [email protected] | ExploitThird Party Advisory |
| https://vuldb.com/?ctiid.350409 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.350409 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.769177 | [email protected] | Third Party AdvisoryVDB Entry |
| https://www.tenda.com.cn/ | [email protected] | Product |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-787 | Out-of-bounds Write | [email protected] |
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-121 | Stack-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| tenda w3 firmware | 1.0.0.3(2204) |
CPE
Remediation
| |
| tenda w3 | All versions |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 2, 2026 | Initial Analysis | [email protected] |
| Mar 12, 2026 | New CVE Received | [email protected] |