CVE-2026-20430: High severity MediaTek Software Development Kit vulnerability

Published Mar 2, 2026
·
Updated

In wlan AP FW, there is a possible out of bounds write due to an incorrect bounds check. 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: WCNCR00467553; Issue ID: MSV-5151.

Affected Software

9 affected components
All of the following
Any of the following
MediaTek Software Development Kit<=7.6.7.3
OpenWrt OpenWrt=19.07.0
OpenWrt OpenWrt=21.02.0
OpenWrt OpenWrt=23.05.0
Any of the following
MediaTek Mt6890
MediaTek MT7915
MediaTek Mt7916
MediaTek Mt7981
MediaTek Mt7986

Event History

Mar 2, 2026
CVE Published
via MITRE·08:39 AM
Data Sourced
via MITRE·08:39 AM
DescriptionWeakness
Data Sourced
via NVD·09:16 AM
DescriptionSeverityWeaknessAffected Software
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of CVE-2026-20430?

CVE-2026-20430 has a severity rating indicating a possible escalation of privilege due to an out of bounds write vulnerability.

2

How do I fix CVE-2026-20430?

To fix CVE-2026-20430, apply the patch identified by Patch ID WCNCR00467553.

3

Which software is affected by CVE-2026-20430?

CVE-2026-20430 affects the MediaTek Software Development Kit up to version 7.6.7.3 and specific versions of OpenWrt.

4

Is user interaction required to exploit CVE-2026-20430?

No, user interaction is not needed for the exploitation of CVE-2026-20430.

5

What can happen if CVE-2026-20430 is exploited?

Exploitation of CVE-2026-20430 could lead to remote escalation of privilege without needing any additional execution privileges.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203