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CVE-2026-20469: CWE-123 Write-what-where Condition in MediaTek, Inc. MediaTek chipset

0
Medium
VulnerabilityCVE-2026-20469cvecve-2026-20469cwe-123
Published: 08/03/2026 (08/03/2026, 02:05:21 UTC)
Source: CVE Database V5
Vendor/Project: MediaTek, Inc.
Product: MediaTek chipset

Description

CVE-2026-20469 is a write-what-where condition vulnerability in MediaTek chipsets related to improper input validation in the trusted_mem component. This flaw could allow a local attacker, who already has System privileges, to escalate their privileges further. Exploitation requires user interaction. Multiple MediaTek chipset models are affected. No CVSS score or official patch information is currently available.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/03/2026, 03:24:21 UTC

Technical Analysis

This vulnerability involves a write-what-where condition (CWE-123) in the trusted_mem component of MediaTek chipsets. Improper input validation may enable a local attacker with existing System privileges to escalate their privileges further. Exploitation requires user interaction. The affected products include specific MediaTek chipset models such as MT8186, MT8188, MT8195, MT8365, MT8370, MT8371, MT8390, MT8391, and MT8395. There is no available CVSS score or vendor advisory indicating patch availability or remediation status at this time.

Potential Impact

The vulnerability could lead to local escalation of privilege on affected MediaTek chipsets if a malicious actor already has System-level access. This increases the attacker's control over the system, potentially allowing unauthorized actions beyond their initial privilege level. However, exploitation requires user interaction and prior System privileges, limiting the scope of impact.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or temporary mitigation is documented, users and administrators should monitor MediaTek advisories for updates. No specific mitigations are provided at this time.

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Technical Details

Data Version
5.2
Assigner Short Name
MediaTek
Date Reserved
2025-11-03T01:30:59.015Z
Cvss Version
null
State
PUBLISHED
Remediation Level
null

Threat ID: 6a700181bf32cb7a34d5c9eb

Added to database: 08/03/2026, 02:48:33 UTC

Last enriched: 08/03/2026, 03:24:21 UTC

Last updated: 08/03/2026, 03:24:21 UTC

Views: 2

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