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CVE-2026-20423

HIGH
7.8
CVSS Score
Published: March 2, 2026 at 08:37 AM UTC
Updated: June 17, 2026 at 10:17 AM UTC
1 product affected across 1 vendorNbiot SDK

Using MT7902, MT7920, MT7921, MT7922, MT7925, MT7927 by MediaTek, Inc.?

Get instant alerts when new vulnerabilities affect MT7902, MT7920, MT7921, MT7922, MT7925, MT7927 - before attackers find them.

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Severity
HIGH7.8
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Nbiot SDK· MediaTek
95%
v ≤ 3.8
mediatek-mt7902 (environment) · mediatek-mt7920 (environment) · mediatek-mt7921 (environment) · mediatek-mt7922 (environment) · mediatek-mt7925 (environment) · mediatek-mt7927 (environment)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://corp.mediatek.com/product-security-bulletin/March-2026

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHCISA-ADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-749CWE-787

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