# CVE-2026-20423

## Summary

- **CVE ID:** CVE-2026-20423
- **Severity:** HIGH
- **CVSS Score:** 7.8 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-749
- **Published:** Mar 2, 2026
- **Last Modified:** Mar 30, 2026

## 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 Products

- MediaTek, Inc. — MT7902, MT7920, MT7921, MT7922, MT7925, MT7927 (NB SDK release 3.8 and before)
- MediaTek, Inc. — MediaTek chipset (MT7902)
- MediaTek, Inc. — MediaTek chipset (MT7920)
- MediaTek, Inc. — MediaTek chipset (MT7921)
- MediaTek, Inc. — MediaTek chipset (MT7922)
- MediaTek, Inc. — MediaTek chipset (MT7925)
- MediaTek, Inc. — MediaTek chipset (MT7927)

## References

- [CNA](https://corp.mediatek.com/product-security-bulletin/March-2026)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.12%
- **EPSS Percentile:** 2.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._