CVE-2026-20516

Published Sep 7, 2026 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Description

In MiracastService, there is a possible escalation of privilege due to a confused deputy. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11060069 / DTV04881615; Issue ID: MSV-7882.

Analysis

Technical impact

The vulnerability in MediaTek’s MiracastService is a classic confused deputy flaw (CWE‑926). An adversary can trigger an escalation of privilege that leads to a local denial of service. The attack requires only user‑level execution rights and does not need any explicit user interaction. Once triggered, the service can be forcibly stopped, disrupting device functionality for the user.

Affected Systems

The flaw affects MediaTek, Inc. chipset devices that run MiracastService. No specific version numbers are provided, but patch IDs ALPS11060069 and DTV04881615 indicate that affected firmware releases are currently being addressed by MediaTek.

Risk and Exploitability

The risk is local, as exploitation requires the attacker to already have user privileges on the device. No user interaction is required, making the attack feasible for anyone with device access. EPSS data is not available, and the vulnerability is not listed in the CISA KEV catalog. The CVSS score of 5.5 indicates a moderate severity; despite this, the potential for a local denial of service with no user involvement suggests that the vulnerability remains a significant concern for device integrity.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

MediaTek, Inc.

MediaTek chipset

unaffected

Version	Status	Constraints
`MT5586`	affected	—
`MT5836`	affected	—
`MT5838`	affected	—
`MT5867`	affected	—
`MT9011`	affected	—
`MT9012`	affected	—
`MT9015`	affected	—
`MT9022`	affected	—
`MT9025`	affected	—
`MT9026`	affected	—
`MT9027`	affected	—
`MT9032`	affected	—
`MT9033`	affected	—
`MT9216`	affected	—
`MT9221`	affected	—
`MT9256`	affected	—
`MT9266`	affected	—
`MT9270`	affected	—
`MT9286`	affected	—
`MT9603`	affected	—
`MT9615`	affected	—
`MT9617`	affected	—
`MT9618`	affected	—
`MT9633`	affected	—
`MT9636`	affected	—
`MT9638`	affected	—
`MT9649`	affected	—
`MT9660`	affected	—
`MT9666`	affected	—
`MT9667`	affected	—
`MT9671`	affected	—
`MT9676`	affected	—
`MT9687`	affected	—
`MT9688`	affected	—
`MT9689`	affected	—
`MT9952`	affected	—
`MT9972`	affected	—
`MT9979`	affected	—
`MT9982`	affected	—

No data.

Vendor Product Versions

Mediatek

Mediatek Chipset

Version	Status	Scheme	Platform
`MT5586`	affected	generic	—
`MT5862`	affected	generic	—
`MT5867`	affected	generic	—
`MT5870`	affected	generic	—
`MT5871`	affected	generic	—
`MT5872`	affected	generic	—
`MT5873`	affected	generic	—
`MT5876`	affected	generic	—
`MT5877`	affected	generic	—
`MT5879`	affected	generic	—
`MT5888`	affected	generic	—
`MT5889`	affected	generic	—
`MT5895`	affected	generic	—
`MT5896`	affected	generic	—
`MT5897`	affected	generic	—
`MT9015`	affected	generic	—
`MT9025`	affected	generic	—
`MT9026`	affected	generic	—
`MT9027`	affected	generic	—
`MT9032`	affected	generic	—
`MT9603`	affected	generic	—
`MT9618`	affected	generic	—
`MT9633`	affected	generic	—
`MT9649`	affected	generic	—
`MT9660`	affected	generic	—
`MT9676`	affected	generic	—
`MT9687`	affected	generic	—
`MT9689`	affected	generic	—
`MT9972`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Apply the MediaTek patch identified by ALPS11060069 / DTV04881615 on all affected devices.
If a patch is not immediately available, disable the MiracastService component to prevent the privilege escalation from being exercised.
Restrict device user accounts to the minimum privileges required for normal operation to limit the scope of any denial of service that may occur.

Generated by OpenCVE AI on September 7, 2026 at 14:26 UTC.

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.134% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://www.mediatek.com/product-security-bulletin/September-2026

History

Sep 7, 2026 2:45 PM Title updated View changes

Type	Values Removed	Values Added
Title	MiracastService Privilege Escalation Leading to Local Denial of Service

Sep 7, 2026 11:30 AM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Sep 7, 2026 5:45 AM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Mediatek Mediatek mediatek Chipset
Vendors & Products		Mediatek Mediatek mediatek Chipset

Sep 7, 2026 3:45 AM Title updated View changes

Type	Values Removed	Values Added
Title		MiracastService Privilege Escalation Leading to Local Denial of Service

Sep 7, 2026 2:00 AM Description updated. Weaknesses updated. Added references View changes

Type	Values Removed	Values Added
Description		In MiracastService, there is a possible escalation of privilege due to a confused deputy. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11060069 / DTV04881615; Issue ID: MSV-7882.
Weaknesses		CWE-926
References		https://www.mediatek.com/product-security-bulletin/September-2026