CVE-2026-20586

Analyzed Analyzed - Analysis Complete

Out-of-Bounds Write in MediaTek vdec Component

Publication date: 2026-10-05

Last updated on: 2026-10-08

Assigner: MediaTek, Inc.

Description

In vdec, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is needed for exploitation. Patch ID: ALPS11383899; Issue ID: MSV-9614.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-10-05

Last Modified

2026-10-08

Generated

2026-10-19

AI Q&A

2026-10-05

EPSS Evaluated

2026-10-18

NVD

CVE-2026-20586

EUVD

EUVD-2026-92208

Affected Vendors & Products

Vendor	Product	Version / Range
mediatek	mt8910_firmware	*
mediatek	mt2718_firmware	*
mediatek	mt6768_firmware	*
mediatek	mt6789_firmware	*
mediatek	mt6769_firmware	*
mediatek	mt6833_firmware	*
mediatek	mt6855_firmware	*
mediatek	mt6877_firmware	*
mediatek	mt8186_firmware	*
mediatek	mt8188_firmware	*
mediatek	mt8189_firmware	*
mediatek	mt8195_firmware	*
mediatek	mt8196_firmware	*
mediatek	mt8367_firmware	*
mediatek	mt8391_firmware	*
mediatek	mt8395_firmware	*
mediatek	mt8668_firmware	*
mediatek	mt8676_firmware	*
mediatek	mt8678_firmware	*
mediatek	mt8696_firmware	*
mediatek	mt8781_firmware	*
mediatek	mt8788e_firmware	*
mediatek	mt8792_firmware	*
mediatek	mt8793_firmware	*
mediatek	mt8799_firmware	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-787	The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This is a vulnerability in the vdec component where a missing bounds check could allow an out of bounds write. This might enable remote privilege escalation without needing extra execution privileges. Exploitation requires user interaction.

Detection Guidance

Detection requires checking for the specific MediaTek vdec component version affected by CVE-2026-20586. Since no direct detection commands are provided in the context, inspect installed MediaTek vdec packages or firmware versions for updates related to Patch ID ALPS11383899 or Issue ID MSV-9614.

Impact Analysis

An attacker could exploit this to gain elevated privileges on your system remotely. Since no additional execution privileges are needed, the risk is higher if user interaction is possible.

Compliance Impact

This vulnerability involves a possible out of bounds write in vdec due to missing bounds checks, potentially leading to remote privilege escalation. While the specific impact on compliance standards like GDPR or HIPAA is not detailed in the provided context, such vulnerabilities could pose risks to data integrity and confidentiality, which are key concerns under these regulations.

Mitigation Strategies

Apply the patch identified as ALPS11383899 to address the missing bounds check in vdec. Ensure the update is applied to all affected systems to prevent potential remote privilege escalation.

Hi! I’m here to help you understand CVE-2026-20586. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70