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Vulnerability record · CVE-2026-20488 · published 3 August 2026

CVE-2026-20488: Mediatek mt6991 firmware out-of-bounds read vulnerability

Mediatek · Mt6991 Firmware

In display, there is a possible information disclosure due to a missing bounds check. This could lead to local information disclosure if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11004276; Issue ID: MSV-7757.

4.4 CVSS 3.1 Medium EPSS 0.16% · top 95.0% CWE-125 · Out-of-bounds read
4.4CVSS 3.1 base score
0.16%EPSS exploitation probability, 30 days
NoNot in CISA KEV
17Affected product versions listed by NVD
1References
19 Aug 2026Last modified by NVD

Description

In display, there is a possible information disclosure due to a missing bounds check. This could lead to local information disclosure if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11004276; Issue ID: MSV-7757.

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

Affected products

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

References

LinkTags
https://www.mediatek.com/product-security-bulletin/August-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-2026-20488), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.