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. EPSS exploitation probability: 0.0%.

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

HIGH

Buffer Overflow (CWE-119)

2026-03-12 cna@vuldb.com

Buffer Overflow Tenda

7.4

CVSS 4.0 · NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Authenticate to Tenda W3 management interface
Delivery

Send HTTP POST to /goform/exeCommand
Exploit

Inject oversized payload in cmdinput parameter
Execution

Trigger stack buffer overflow
Impact

Execute arbitrary code on device

Vulnerability Assessment

Weakness	CWE CWE-119 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Bounds checking, buffer size validation MITRE ATT&CK 2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	Authenticated access to Tenda W3 1.0.0.3(2204) HTTP management interface with PR:L privileges required. No authentication bypass; attacker must possess valid management credentials to access /goform/exeCommand endpoint.
Impact	CVSS 8.8 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: None. Exploitable via remote/network.
Exploit ScenarioDerived	A remote attacker could exploit this flaw, stack-based buffer overflow.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

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.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 19:57 CVSS 7.4

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. [CVSS 8.8 HIGH]

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.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

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.

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Exploit and PoC references, threat intelligence from 22 sources

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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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

Low

User Interaction

None

Vulnerable system: Confidentiality

High

Vulnerable system: Integrity

High

Vulnerable system: Availability

High

Subsequent system: Confidentiality

None

Subsequent system: Integrity

None

Subsequent system: Availability

None

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.

Executive ViewAI

Why It Matters

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. Organizations using these devices face immediate risk of network compromise, data exfiltration, and lateral movement into corporate infrastructure, particularly concerning if deployed in office networks or as remote access points.

Business Impact: High

Compensating Controls

Implement Web Application Firewall (WAF) rules to block HTTP requests to /goform/exeCommand endpoint; restrict network access to affected devices using ACLs and firewall rules limiting connections to trusted administrative IP ranges only; disable the HTTP management interface if not actively required and use alternative secure management channels; segment affected devices to isolated VLANs with minimal access to sensitive systems; enable detailed logging and alerting on any access attempts to the vulnerable endpoint; consider temporary device shutdown if the device is non-critical pending patch availability.

Threat Intelligence Overview

EPSS Score

0.0%

Top 86% exploitable

Data Quality

5 sources

Confidence: Medium

NVD

CVE.org

EPSS

GitHub

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.0%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +37

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.