What is the CVSS score of CVE-2026-24109?

CVE-2026-24109 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-2026-24109?

A critical remote code execution vulnerability (CVE-2026-24109) affects Tenda W20E wireless devices with no vendor patch currently available.

Is there a public PoC exploit available for CVE-2026-24109?

Yes, a public proof-of-concept exploit is available for CVE-2026-24109. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-24109?

Within 24 hours: Inventory all Tenda W20E V4.0br_V15.11.0.6 devices across the organization and isolate affected units from production networks. Within 7 days: Evaluate replacement options or identify alternative network equipment; implement network segmentation to restrict device access; document all compensating controls deployed. Within 30 days: Complete migration away from affected devices or retire them entirely pending vendor patch availability.

W20e Firmware CVE-2026-24109

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 05, 2026 - 16:16 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. Attackers may exploit the vulnerability by controlling the value of picName. When this value is used in sprintf without validating variable sizes, it could lead to a buffer overflow vulnerability.