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Vulnerability record · CVE-2026-20528 · published 5 October 2026

CVE-2026-20528: Mediatek mt2735 firmware out-of-bounds write vulnerability

Mediatek · Mt2735 Firmware

In ccci, there is a possible out of bounds write and read due to a missing bounds check. This could lead to local information disclosure, memory corruption, crashes, or privilege escalation if a malicious actor has already obtained the System privilege. User interaction is needed for exploitation. Patch ID: ALPS11428950 (Note: For MT6880, MT6890) / ALPS10563453 (Note: For MT6980D, MT6990, MT6986, MT6986D, MT6813, MT6988) / AUTO00858766 (Note: For MT2735, MT2737); Issue ID: MSV-9893.

6.7 CVSS 3.1 Medium EPSS 0.12% · top 98.4% CWE-787 · Out-of-bounds write
6.7CVSS 3.1 base score
0.12%EPSS exploitation probability, 30 days
NoNot in CISA KEV
10Affected product versions listed by NVD
1References
9 Oct 2026Last modified by NVD

Description

In ccci, there is a possible out of bounds write and read due to a missing bounds check. This could lead to local information disclosure, memory corruption, crashes, or privilege escalation if a malicious actor has already obtained the System privilege. User interaction is needed for exploitation. Patch ID: ALPS11428950 (Note: For MT6880, MT6890) / ALPS10563453 (Note: For MT6980D, MT6990, MT6986, MT6986D, MT6813, MT6988) / AUTO00858766 (Note: For MT2735, MT2737); Issue ID: MSV-9893.

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

Affected products

10 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-2026-20528), CISA KEV, FIRST EPSS (scores of 2026-10-11). This page is refreshed as NVD updates the record.