CVE-2026-20430
Received Received - Intake

Out-of-Bounds Write in WLAN AP Firmware Enables Remote Privilege Escalation

Publication date: 2026-03-02

Last updated on: 2026-03-02

Assigner: MediaTek, Inc.

Description
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.

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Meta Information

Published
2026-03-02
Last Modified
2026-03-02
Generated
2026-07-06
AI Q&A
2026-03-02
EPSS Evaluated
2026-07-05
NVD
CVE-2026-20430
EUVD
EUVD-2026-9158

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
openwrt openwrt 19.07.0
openwrt openwrt 21.02.0
openwrt openwrt 23.05.0
mediatek software_development_kit to 7.6.7.3 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.

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Executive Summary

This vulnerability exists in the wlan AP firmware where an incorrect bounds check can cause an out of bounds write.

This means that the software may write data outside the intended memory area, which can lead to unexpected behavior.

Exploitation of this flaw can allow a remote attacker who is physically close (proximal or adjacent) to escalate their privileges without needing any additional execution privileges or user interaction.

Impact Analysis

The impact of this vulnerability is that a nearby attacker could escalate their privileges on the affected device remotely.

This escalation of privilege could allow the attacker to gain higher-level access than intended, potentially compromising the security and integrity of the device.

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