Which versions of Tenda are affected by CVE-2026-3974?

A critical remote code execution vulnerability in Tenda W3 wireless devices (version 1.0.0.3(2204)) allows unauthenticated attackers to execute arbitrary commands on affected systems.

How to fix or mitigate CVE-2026-3974?

Within 24 hours: Identify and inventory all Tenda W3 1.0.0.3(2204) devices in your environment using network scanning tools; isolate critical instances from trusted networks if feasible. Within 7 days: Contact Tenda for patch status and availability; implement network segmentation to restrict access to affected devices; monitor for exploitation attempts in logs. Within 30 days: Deploy patched firmware immediately upon release; if no patch becomes available, evaluate device replacement with alternative vendors or implement strict perimeter controls as described in compensating controls.

Tenda CVE-2026-3974

Q: What is the CVSS score of CVE-2026-3974?

CVE-2026-3974 has a CVSS 4.0 base score of 7.4 (High). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

HIGH

Buffer Overflow (CWE-119)

2026-03-12 cna@vuldb.com

Buffer Overflow Tenda

7.4

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

7.4 HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 19:57 vuln.today

CVE Published

Mar 12, 2026 - 03:15 nvd

HIGH 7.4

DescriptionCVE.org

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.

AnalysisAI

Stack-based buffer overflow in Tenda W3 1.0.0.3(2204) HTTP handler allows authenticated remote attackers to execute arbitrary code by sending a crafted request to the /goform/exeCommand endpoint with an oversized cmdinput parameter. Public exploit code exists for this vulnerability, and no patch is currently available.

Technical ContextAI

Classified as CWE-119 (Buffer Overflow). 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.

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.