Buffer overflow in Mediatek, Inc. Mediatek Chipset
CVE-2026-20528
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Mediatek, Inc. Mediatek Chipset — versions MT2735, MT2737, MT6813
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-20528?
- CVE-2026-20528 is a medium-severity vulnerability in Mediatek, Inc. Mediatek Chipset, classified under Out-of-bounds Write. CVSS score: 6.7/10. Published 2026-10-05.
- How severe is CVE-2026-20528?
- Medium severity. CVSS v3 base score is 6.7 out of 10.