# CVE-2026-20501

## Summary

- **CVE ID:** CVE-2026-20501
- **Severity:** HIGH
- **CVSS Score:** 8.4 (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-122
- **Published:** Sep 7, 2026
- **Last Modified:** Sep 8, 2026

## Description

In vdec, there is a possible out of bounds write due to a heap buffer overflow. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11262030; Issue ID: MSV-9197.

## Affected Products

- MediaTek, Inc. — MediaTek chipset (MT2718)
- MediaTek, Inc. — MediaTek chipset (MT6580)
- MediaTek, Inc. — MediaTek chipset (MT6739)
- MediaTek, Inc. — MediaTek chipset (MT6761)
- MediaTek, Inc. — MediaTek chipset (MT6765)
- MediaTek, Inc. — MediaTek chipset (MT6768)
- MediaTek, Inc. — MediaTek chipset (MT6769)
- MediaTek, Inc. — MediaTek chipset (MT6779)
- MediaTek, Inc. — MediaTek chipset (MT6781)
- MediaTek, Inc. — MediaTek chipset (MT6785)
- MediaTek, Inc. — MediaTek chipset (MT6789)
- MediaTek, Inc. — MediaTek chipset (MT6833)
- MediaTek, Inc. — MediaTek chipset (MT6835)
- MediaTek, Inc. — MediaTek chipset (MT6853)
- MediaTek, Inc. — MediaTek chipset (MT6855)
- MediaTek, Inc. — MediaTek chipset (MT6858)
- MediaTek, Inc. — MediaTek chipset (MT6873)
- MediaTek, Inc. — MediaTek chipset (MT6877)
- MediaTek, Inc. — MediaTek chipset (MT6878)
- MediaTek, Inc. — MediaTek chipset (MT6879)
- MediaTek, Inc. — MediaTek chipset (MT6881)
- MediaTek, Inc. — MediaTek chipset (MT6883)
- MediaTek, Inc. — MediaTek chipset (MT6885)
- MediaTek, Inc. — MediaTek chipset (MT6886)
- MediaTek, Inc. — MediaTek chipset (MT6889)
- MediaTek, Inc. — MediaTek chipset (MT6893)
- MediaTek, Inc. — MediaTek chipset (MT6895)
- MediaTek, Inc. — MediaTek chipset (MT6897)
- MediaTek, Inc. — MediaTek chipset (MT6899)
- MediaTek, Inc. — MediaTek chipset (MT6983)
- MediaTek, Inc. — MediaTek chipset (MT6985)
- MediaTek, Inc. — MediaTek chipset (MT6989)
- MediaTek, Inc. — MediaTek chipset (MT6991)
- MediaTek, Inc. — MediaTek chipset (MT6993)
- MediaTek, Inc. — MediaTek chipset (MT8126)
- MediaTek, Inc. — MediaTek chipset (MT8171)
- MediaTek, Inc. — MediaTek chipset (MT8186)
- MediaTek, Inc. — MediaTek chipset (MT8188)
- MediaTek, Inc. — MediaTek chipset (MT8189)
- MediaTek, Inc. — MediaTek chipset (MT8195)
- MediaTek, Inc. — MediaTek chipset (MT8196)
- MediaTek, Inc. — MediaTek chipset (MT8367)
- MediaTek, Inc. — MediaTek chipset (MT8391)
- MediaTek, Inc. — MediaTek chipset (MT8395)
- MediaTek, Inc. — MediaTek chipset (MT8668)
- MediaTek, Inc. — MediaTek chipset (MT8676)
- MediaTek, Inc. — MediaTek chipset (MT8678)
- MediaTek, Inc. — MediaTek chipset (MT8696)
- MediaTek, Inc. — MediaTek chipset (MT8781)
- MediaTek, Inc. — MediaTek chipset (MT8788E)
- MediaTek, Inc. — MediaTek chipset (MT8792)
- MediaTek, Inc. — MediaTek chipset (MT8799)
- MediaTek, Inc. — MediaTek chipset (MT8910)

## References

- [CNA](https://www.mediatek.com/product-security-bulletin/September-2026)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.13%
- **EPSS Percentile:** 2.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._