What is the CVSS score of CVE-2026-24114?

CVE-2026-24114 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Is there a public PoC exploit available for CVE-2026-24114?

Yes, a public proof-of-concept exploit is available for CVE-2026-24114. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-24114?

Within 24 hours: Identify and inventory all Tenda W20E V4.0br_V15.11.0.6 devices across your network. Within 7 days: Isolate affected devices to a segregated network segment or disable external access via firewall rules; implement network-based monitoring for exploitation attempts. Within 30 days: Develop a hardware replacement plan and begin procurement of alternative router solutions; contact Tenda for patch availability updates weekly.

W20e Firmware CVE-2026-24114

CRITICAL

Classic Buffer Overflow (CWE-120)

2026-03-02 cve@mitre.org

Buffer Overflow Tenda W20e Firmware

9.8

CVSS 3.1 · NVD

View

Attack ChainAIDerived

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

Access

Send crafted HTTP request to router
Exploit

Access port mapping configuration endpoint
Execution

Trigger strcpy buffer overflow via pPortMapIndex parameter
Impact

Execute arbitrary code as root

Vulnerability Assessment

Weakness	CWE CWE-120 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Buffer copy size validation MITRE ATT&CK 1 technique across 1 tactic: Execution The technique list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 W20E V4.0br_V15.11.0.6 with port mapping feature exposed to network. No authentication required. Remote unauthenticated exploitation against default router configurations.
Impact	CVSS 9.8 with PoC.
Exploit ScenarioDerived	Overflow via pPortMapIndex.

Act Now Prioritize within 24-48h. Why: CRITICAL severity + public POC available.

No patch listed yet 0.1% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Mar 12, 2026

Tenda W20E has a sixth buffer overflow in pPortMapIndex parameter validation.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:55 CVSS 9.8

Sixth Tenda W20E overflow.

RemediationAI

Update firmware.

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

CWE-120.

Know when W20e Firmware gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

PoC Detected

Mar 03, 2026 - 20:16 vuln.today

Public exploit code

CVE Published

Mar 02, 2026 - 15:16 nvd

CRITICAL 9.8

DescriptionCVE.org

An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Failure to validate pPortMapIndex may lead to buffer overflows when using strcpy.

Executive ViewAI

Why It Matters

A critical vulnerability in Tenda W20E routers (V4.0br_V15.11.0.6) allows remote attackers to execute arbitrary code with a 9.8 CVSS severity rating. Organizations using this device model face immediate risk of complete system compromise, data theft, and network infiltration. The absence of an available patch combined with public exploit code significantly elevates threat urgency.

Business Impact: Severe

Compensating Controls

Implement network segmentation to isolate affected Tenda devices; disable remote management interfaces and restrict administrative access to internal networks only; deploy WAF/IDS rules to detect buffer overflow patterns targeting the pPortMapIndex parameter; monitor for suspicious process execution on connected systems; disable UPnP and port mapping services if not operationally required; consider temporary replacement with patched alternative devices pending vendor patch release.

Threat Intelligence Overview

EPSS Score

0.1%

Top 84% exploitable

Exploit

POC

Public exploit code exists

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS

GitHub

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 CRITICAL

CISA KEV No

Public POC Yes

EPSS 0.1%

Patch available No

Active threat No

Deciding rule

CRITICAL severity + public POC available

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

Out-of-Cycle

Exploitation· derived

Poc

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

Very High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +49

PoC: +20

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.