CVE-2026-20423: High severity Microsoft Windows WLAN STA Driver vulnerability
Published Mar 2, 2026
·Updated
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 Software
8 affected components
Microsoft Windows WLAN STA Driver
All of the following
MediaTek Nbiot Sdk<=3.8
Any of the following
MediaTek Mt7902
MediaTek Mt7920
MediaTek Mt7921
MediaTek Mt7922
MediaTek Mt7925
MediaTek Mt7927
Event History
Mar 2, 2026
CVE Published
via MITRE·08:37 AM
Data Sourced
via MITRE·08:37 AM
DescriptionWeakness
Data Sourced
via NVD·09:16 AM
DescriptionSeverityWeaknessAffected Software
Feb 19, 58140
Event
via NVD·04:11 PM
Frequently Asked Questions
1
What is the severity of CVE-2026-20423?
CVE-2026-20423 has a medium severity rating due to the potential for local privilege escalation.
2
How do I fix CVE-2026-20423?
To fix CVE-2026-20423, users should apply the relevant patch identified by Patch ID WCNCR00465314.
3
What type of vulnerability is CVE-2026-20423?
CVE-2026-20423 is an out of bounds write vulnerability in the wlan STA driver.
4
Is user interaction required to exploit CVE-2026-20423?
No, user interaction is not needed for the exploitation of CVE-2026-20423.
5
What privileges are required to exploit CVE-2026-20423?
Exploitation of CVE-2026-20423 requires user execution privileges.