Is CVE-2026-20408 actively exploited?

CVE-2026-20408 has no public evidence of in-the-wild exploitation as of 2026-02-04.

What is the CVSS score for CVE-2026-20408?

CVE-2026-20408 has a CVSS score of 8.8 (HIGH severity). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2026-20408?

Patch guidance is available from mediatek security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-20408.

Fix CVE-2026-20408 - HIGH mediatek software development kit

Q: Which products are affected by CVE-2026-20408?

4 products: mediatek software development kit, openwrt openwrt, openwrt openwrt, openwrt openwrt.

Description

In wlan, there is a possible out of bounds write due to a heap buffer overflow. This could lead to remote (proximal/adjacent) escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00461651; Issue ID: MSV-4758.

CVSS Metrics

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector: adjacent network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-122 CWE-787 · Out-of-bounds Write

Metadata

Primary Vendor: MEDIATEK
Published: 2/2/2026
Last Modified: 2/4/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

mediatek : software_development_kitopenwrt : openwrtopenwrt : openwrtopenwrt : openwrt

Remediation Guidance

Executive Summary

Cite this page

CVE-2026-20408. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2026-20408

View on NIST NVD

CVE-2026-20408 vulnerability