What is the CVSS score of CVE-2026-4008?

CVE-2026-4008 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: 0.1%.

How to fix or mitigate CVE-2026-4008?

Within 24 hours: Inventory all Tenda W3 1.0.0.3(2204) devices in your environment and isolate affected units from production networks. Within 7 days: Implement network segmentation to restrict administrative access to these devices and monitor for suspicious POST requests to /goform/wifiSSIDset. Within 30 days: Replace affected Tenda W3 devices with alternative vendors or request emergency firmware updates from Tenda; establish a vendor communication protocol to track patch availability.

Tenda CVE-2026-4008

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 web interface
Delivery

Send POST request to /goform/wifiSSIDset
Exploit

Manipulate index/GO parameter with oversized payload
Execution

Trigger stack-based buffer overflow
Impact

Execute arbitrary code

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Weakness	CWE CWE-119 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Bounds checking, buffer size validation MITRE ATT&CK 2 techniques across 2 tactics: Execution,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	Tenda W3 firmware version 1.0.0.3(2204) with web management interface accessible. Requires valid login credentials to POST Parameter Handler. Target endpoint: /goform/wifiSSIDset with index/GO argument manipulation capability.
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 vulnerability to stack-based buffer overflow.

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

No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Remote code execution in Tenda W3 1.0.0.3(2204) via stack buffer overflow in the /goform/wifiSSIDset POST parameter handler allows authenticated attackers to achieve complete system compromise. The vulnerability exists in the index/GO parameter processing and can be exploited over the network without user interaction. Public exploit code is available for this vulnerability.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 19:57 CVSS 7.4

A flaw has been found in Tenda W3 1.0.0.3(2204). This issue affects some unknown processing of the file /goform/wifiSSIDset of the component POST Parameter 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 flaw has been found in Tenda W3 1.0.0.3(2204). This issue affects some unknown processing of the file /goform/wifiSSIDset of the component POST Parameter Handler. Executing a manipulation of the argument index/GO can lead to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been published and may 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 flaw has been found in Tenda W3 1.0.0.3(2204). This issue affects some unknown processing of the file /goform/wifiSSIDset of the component POST Parameter Handler. Executing a manipulation of the argument index/GO can lead to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been published and may be used.

Executive ViewAI

Why It Matters

A critical vulnerability in Tenda W3 wireless devices (version 1.0.0.3) allows remote attackers to compromise WiFi configuration through a POST parameter injection attack, with no patch currently available. Organizations using affected Tenda W3 devices face immediate risk of unauthorized network access, data interception, and potential lateral movement into corporate networks.

Business Impact: High

Compensating Controls

Disable remote management of affected Tenda W3 devices; implement WAF rules to block POST requests to /goform/wifiSSIDset from untrusted sources; segment wireless device management traffic to isolated administrative VLANs; enforce strict ingress/egress filtering on networks where these devices operate; increase monitoring and alerting on WiFi configuration changes; disable the WiFi SSID configuration feature if operationally feasible.

Threat Intelligence Overview

EPSS Score

0.1%

Top 75% 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 0.1%

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.