CVE-2026-20483: CWE-862 Missing Authorization in MediaTek, Inc. MediaTek chipset
In Telephony, there is a possible escalation of privilege due to a missing permission check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11087526; Issue ID: MSV-8243.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-20483) is classified as CWE-862 (Missing Authorization) and exists in the Telephony functionality of MediaTek chipsets. Due to a missing permission check, an attacker with local access can escalate privileges without needing extra execution rights or user interaction. The CVSS v3.1 base score is 7.7, reflecting high impact on confidentiality and integrity but no impact on availability. The affected chipsets include a broad range of MediaTek models such as MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6983, MT6985, MT6989, MT6991, MT6993, MT8766, MT8768, MT8775, MT8781, MT8792, MT8796, MT8873, MT8883, and MT8893. There is no vendor advisory or patch information currently available, and no known exploits in the wild have been reported.
Potential Impact
An attacker with local access can escalate privileges on affected MediaTek chipsets due to a missing authorization check in the Telephony component. This could lead to unauthorized access to sensitive data and modification of system integrity. The vulnerability does not require user interaction or additional execution privileges, increasing its risk. However, availability is not impacted.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or mitigation instructions are currently available. Users and administrators should monitor MediaTek advisories for updates and apply patches once released.
CVE-2026-20483: CWE-862 Missing Authorization in MediaTek, Inc. MediaTek chipset
Description
In Telephony, there is a possible escalation of privilege due to a missing permission check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11087526; Issue ID: MSV-8243.
CVSS v3.1
Score 7.7high
Affected software
MediaTek, Inc.
MediaTek chipset
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-20483) is classified as CWE-862 (Missing Authorization) and exists in the Telephony functionality of MediaTek chipsets. Due to a missing permission check, an attacker with local access can escalate privileges without needing extra execution rights or user interaction. The CVSS v3.1 base score is 7.7, reflecting high impact on confidentiality and integrity but no impact on availability. The affected chipsets include a broad range of MediaTek models such as MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6983, MT6985, MT6989, MT6991, MT6993, MT8766, MT8768, MT8775, MT8781, MT8792, MT8796, MT8873, MT8883, and MT8893. There is no vendor advisory or patch information currently available, and no known exploits in the wild have been reported.
Potential Impact
An attacker with local access can escalate privileges on affected MediaTek chipsets due to a missing authorization check in the Telephony component. This could lead to unauthorized access to sensitive data and modification of system integrity. The vulnerability does not require user interaction or additional execution privileges, increasing its risk. However, availability is not impacted.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or mitigation instructions are currently available. Users and administrators should monitor MediaTek advisories for updates and apply patches once released.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- MediaTek
- Date Reserved
- 2025-11-03T01:30:59.021Z
- State
- PUBLISHED
Threat ID: 6a700183bf32cb7a34d5caaf
Added to database: 08/03/2026, 02:48:35 UTC
Last enriched: 08/10/2026, 14:39:13 UTC
Last updated: 09/11/2026, 19:31:54 UTC
Views: 28
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