In Telephony, there is a possible memory corruption due to a heap buffer overflow. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11006447; Issue ID: MSV-7871.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00136.

Exploitation none

Automatable no

Technical Impact total

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
MT6739 affected —
MT6761 affected —
MT6765 affected —
MT6768 affected —
MT6781 affected —
MT6789 affected —
MT6833 affected —
MT6853 affected —
MT6855 affected —
MT6877 affected —
MT6883 affected —
MT6885 affected —
MT6889 affected —
MT6893 affected —
MT8695 affected —
MT8696 affected —
MT8765 affected —
MT8766 affected —
MT8766R affected —
MT8768 affected —
MT8781 affected —
MT8791 affected —

No data.

No data.

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Vendors Products
Mediatek, Inc. Subscribe
Mediatek Chipset Subscribe

Project Subscriptions

Vendors Products
Mediatek, Inc. Subscribe
Mediatek Chipset Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://corp.mediatek.com/product-security-bulletin/July-2026 cve-icon
History

Thu, 02 Jul 2026 01:45:00 +0000

Type Values Removed Values Added
Title MediaTek Telephony Heap Buffer Overflow Leading to Local Privilege Escalation

Wed, 01 Jul 2026 22:00:00 +0000

Type Values Removed Values Added
Title MediaTek Telephony Heap Buffer Overflow Leading to Local Privilege Escalation

Wed, 01 Jul 2026 17:30:00 +0000

Type Values Removed Values Added
Title Heap Buffer Overflow in MediaTek Telephony Subsystem Enables Local Privilege Escalation

Wed, 01 Jul 2026 13:45:00 +0000

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

Wed, 01 Jul 2026 11:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.7, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Wed, 01 Jul 2026 09:15:00 +0000

Type Values Removed Values Added
Title Heap Buffer Overflow in MediaTek Telephony Subsystem Enables Local Privilege Escalation

Wed, 01 Jul 2026 03:30:00 +0000

Type Values Removed Values Added
Description In Telephony, there is a possible memory corruption due to a heap buffer overflow. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11006447; Issue ID: MSV-7871.
Weaknesses CWE-122
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: MediaTek

Published:

Updated: 2026-07-01T10:36:32.073Z

Reserved: 2025-11-03T01:30:59.014Z

Link: CVE-2026-20462

cve-icon Vulnrichment

Updated: 2026-07-01T10:36:28.557Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-02T01:30:17Z

Weaknesses