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MediaTek Telephony CVE-2026-20470

| EUVDEUVD-2026-52074 MEDIUM
Improper Export of Android Application Components (CWE-926)
2026-08-03 MediaTek GHSA-673r-7q9g-8844
6.2
CVSS 3.1 · Vendor: MediaTek
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Severity by source

Vendor (MediaTek) PRIMARY
6.2 MEDIUM
AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
vuln.today AI
6.2 MEDIUM

Local vector required since exploitation demands on-device app execution; PR:N confirmed because the exported component imposes no privilege check on callers; C:H reflects telephony subscriber data sensitivity; no integrity or availability impact.

3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
4.0 AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (MediaTek).

CVSS VectorVendor: MediaTek

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

Lifecycle Timeline

4
Analysis Generated
Aug 03, 2026 - 20:30 vuln.today
CVSS changed
Aug 03, 2026 - 20:22 NVD
6.2 (MEDIUM)
CVE Published
Aug 03, 2026 - 02:05 cve.org
UNKNOWN (no severity yet)
CVE Published
Aug 03, 2026 - 02:05 cve.org
MEDIUM 6.2

DescriptionCVE.org

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.

AnalysisAI

Local information disclosure in the Telephony component across 42 MediaTek chipsets enables any unprivileged application on the device to extract sensitive telephony data without elevated permissions. The root cause is a missing Android permission check (CWE-926: Improper Export of Android Application Components), allowing improperly exported Telephony interfaces to be queried by any installed app. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires that an attacker have local code execution on the device, specifically a malicious or compromised application installed on the target Android device running an affected MediaTek chipset (any of the 42 SKUs listed). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N scores 6.2, which is consistent with the attack profile: local vector limits exposure relative to network-accessible flaws, but the absence of any privilege requirement (PR:N) and lack of user interaction (UI:N) means any installed application - including those with only INTERNET permission - can potentially invoke the exposed component. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Apply patch ALPS11086431 as documented in MediaTek's August 2026 Product Security Bulletin at https://www.mediatek.com/product-security-bulletin/August-2026. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-20470 vulnerability details – vuln.today

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