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Vulnerability record · CVE-2026-20446 · published 7 April 2026

CVE-2026-20446: Mediatek mt6813 firmware out-of-bounds write vulnerability

Mediatek · Mt6813 Firmware

In sec boot, there is a possible out of bounds write due to an integer overflow. This could lead to local denial of service, if an attacker has physical access to the device, with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS09963054; Issue ID: MSV-3899.

4.3 CVSS 3.1 Medium EPSS 0.19% · top 92.1% CWE-787 · Out-of-bounds writeCWE-190 · Integer overflow
4.3CVSS 3.1 base score
0.19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

In sec boot, there is a possible out of bounds write due to an integer overflow. This could lead to local denial of service, if an attacker has physical access to the device, with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS09963054; Issue ID: MSV-3899.

CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://corp.mediatek.com/product-security-bulletin/April-2026 Vendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-20446), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.