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%.

Which versions of W20e Firmware are affected by CVE-2026-24114?

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.

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 W20e Firmware

9.8

CVSS 3.1 · NVD

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

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

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.

AnalysisAI

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

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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

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 AssessmentAI

Exploitation	Tenda W20E V4.0br_V15.11.0.6 with port mapping feature exposed to network. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	CVSS 9.8 with PoC. Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	Overflow via pPortMapIndex.
Remediation	Update firmware. Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Identify and inventory all Tenda W20E V4.0br_V15.11.0.6 devices across your network. …

Threat intelligence, references, and detailed analysis are available after sign-in.

CVE-2026-24114 vulnerability details – vuln.today

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W20e Firmware CVE-2026-24114

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

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Attack ChainAIDerived

Vulnerability AssessmentAI

Recommended ActionAI

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External POC / Exploit Code