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Vulnerability record · CVE-2026-20521 · published 5 October 2026

CVE-2026-20521: Mediatek mt8910 firmware stack-based buffer overflow vulnerability

Mediatek · Mt8910 Firmware

In Video HAL, there is a possible escalation of privilege due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11375674; Issue ID: MSV-9571.

8.4 CVSS 3.1 High EPSS 0.13% · top 97.4% CWE-121 · Stack-based buffer overflow
8.4CVSS 3.1 base score
0.13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
48Affected product versions listed by NVD
1References
8 Oct 2026Last modified by NVD

Description

In Video HAL, there is a possible escalation of privilege due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11375674; Issue ID: MSV-9571.

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

Affected products

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

References

LinkTags
https://www.mediatek.com/product-security-bulletin/October-2026 Vendor Advisory

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2026-20521), CISA KEV, FIRST EPSS (scores of 2026-10-16). This page is refreshed as NVD updates the record.