VulnerabilityPublished 3 Aug 2026Updated 30 Oct 2026

CVE-2026-20470: MediaTek chipset · Improper Export of Android Application Components

Affects MediaTek chipsetSource CVE Database V5

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Not known to be exploited · CVSS 6.2 Medium.

Data as of 1 Nov 2026, 08:20 UTC

CVSS 3.1 base score

6.2Medium

How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none

CVSS scores by source
CISA-ADP	CVSS 3.1	6.2

EPSS: 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector: Local
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Local: The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or remotely (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., tricking a legitimate user into opening a malicious document).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 3 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 31 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
MediaTek, Inc.MediaTek chipset	Affected MT6739 – MT8893 51 affected builds	Fixed in–

AI-suggested

Since no official remediation level or patch links are provided, users and administrators should monitor MediaTek's advisories for updates. Until a fix is available, limiting local access to trusted users and devices may reduce risk.

Description

In Telephony, there is a possible information disclosure due to a missing permission check. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11086431; Issue ID: MSV-8189.

Impact

An attacker with local access to a device using an affected MediaTek chipset could exploit this vulnerability to disclose sensitive information from the Telephony component without needing additional privileges or user interaction. The impact is limited to confidentiality, with no impact on integrity or availability. This could potentially aid further attacks or information gathering but does not directly allow code execution or denial of service.

Summary

This vulnerability (CVE-2026-20470) involves an improper export of Android application components in MediaTek chipsets, specifically within the Telephony functionality. Due to a missing permission check, an attacker with local access could disclose sensitive information without needing elevated privileges or user interaction. The issue is tracked under CWE-926 (Improper Export of Android Application Components). The CVSS v3.1 base score is 6.2, indicating medium severity, with confidentiality impact but no integrity or availability impact. The vulnerability affects a broad range of MediaTek chipset models as explicitly listed.

CWE-926Improper Export of Android Application Components (opens in a new tab)
Variant weaknessOWASP Top 10 A08:2025: Software or Data Integrity Failures (opens in a new tab)
The Android application exports a component for use by other applications, but does not properly restrict which applications can launch the component or access the data it contains.
Build and Compilation · Attack Surface Reduction
If they do not need to be shared by other applications, explicitly mark components with android:exported="false" in the application manifest.
Build and Compilation · Attack Surface Reduction
If you only intend to use exported components between related apps under your control, use android:protectionLevel="signature" in the xml manifest to restrict access to applications signed by you.
Build and Compilation · Architecture and Design · Attack Surface Reduction
Limit Content Provider permissions (read/write) as appropriate.
OWASP Cheat Sheets
Software Supply Chain Security (opens in a new tab)
Infrastructure as Code (opens in a new tab)
OWASP ASVS 4.0.3
V8.3.8 (opens in a new tab)
V13.4.2 (opens in a new tab)
V7.2.2 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

mediatek.com/product-security-bulletin/August-2026 (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 10 Aug 2026, 14:57 UTC

WeaknessesCWE-926

Technical details

References

Community reviews

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