Vulnerability Report

CVE-2026-20408

Title: Remote Privilege Escalation in WLAN via Heap Buffer Overflow

Memory Corruption

Proof Of Concept

No public PoC currently indexed for CVE-2026-20408.

CWE Category CWE-122

Published Date Feb 02, 2026

Modified Date Feb 04, 2026

Exploit Status Not Found

Score 8.8 CVSS v

Exploit Probability (EPSS)

0.27%

Vulnerability Summary

CVE-2026-20408: 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.

Impacted Vendors

mediatek 7

splunk 1

Reference Links

https://corp.mediatek.com/product-security-bulletin/February-2026

CVSS v3.1

Source Entity 134c704f-9b21-4f2e-91b3-4a467353bcc0

Severity HIGH

8.8

Attack Vector

ADJACENT_NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

Associated Attack Patterns (CAPEC)

Total: Patterns