Is CVE-2026-20423 actively exploited?

CVE-2026-20423 has no public evidence of in-the-wild exploitation as of 2026-03-03.

What is the CVSS score for CVE-2026-20423?

CVE-2026-20423 has a CVSS score of 7.8 (HIGH severity). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2026-20423?

Patch guidance is available from mediatek security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-20423.

Fix CVE-2026-20423 - HIGH mediatek nbiot sdk

Description

In wlan STA driver, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00465314; Issue ID: MSV-4956.

CVSS Metrics

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector: local
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-749 CWE-787 · Out-of-bounds Write

Metadata

Primary Vendor: MEDIATEK
Published: 3/2/2026
Last Modified: 3/3/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

mediatek : nbiot_sdk

Remediation Guidance

Executive Summary

Cite this page

CVE-2026-20423. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2026-20423

View on NIST NVD

CVE-2026-20423 vulnerability