CVE-2026-20466: CWE-787 Out-of-bounds Write in MediaTek, Inc. MediaTek chipset
CVE-2026-20466 is a heap buffer overflow vulnerability in the secure boot component of certain MediaTek chipsets. This flaw allows a local attacker with physical access to the device to escalate privileges without requiring additional execution privileges or user interaction. The affected chipsets include MT2737, MT6880, MT6890, and MT6990. No CVSS score or official patch status is currently provided.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds write (CWE-787) in the secure boot process of MediaTek chipsets MT2737, MT6880, MT6890, and MT6990. The heap buffer overflow can be exploited locally by an attacker with physical access to escalate privileges. Exploitation does not require user interaction or prior execution privileges. Patch identifiers are noted (AUTO00845351 for MT2737 and ALPS11072643 for MT6880, MT6890, MT6990), but no official remediation level or patch availability is confirmed in the advisory.
Potential Impact
Successful exploitation could lead to local privilege escalation on affected devices, potentially allowing an attacker with physical access to gain higher privileges than intended. There is no indication of remote exploitation or need for user interaction. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The vendor has referenced patch IDs related to this issue, but no official fix or remediation level is stated in the available data. Until an official patch is confirmed, restrict physical access to affected devices to mitigate risk.
CVE-2026-20466: CWE-787 Out-of-bounds Write in MediaTek, Inc. MediaTek chipset
Description
CVE-2026-20466 is a heap buffer overflow vulnerability in the secure boot component of certain MediaTek chipsets. This flaw allows a local attacker with physical access to the device to escalate privileges without requiring additional execution privileges or user interaction. The affected chipsets include MT2737, MT6880, MT6890, and MT6990. No CVSS score or official patch status is currently provided.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds write (CWE-787) in the secure boot process of MediaTek chipsets MT2737, MT6880, MT6890, and MT6990. The heap buffer overflow can be exploited locally by an attacker with physical access to escalate privileges. Exploitation does not require user interaction or prior execution privileges. Patch identifiers are noted (AUTO00845351 for MT2737 and ALPS11072643 for MT6880, MT6890, MT6990), but no official remediation level or patch availability is confirmed in the advisory.
Potential Impact
Successful exploitation could lead to local privilege escalation on affected devices, potentially allowing an attacker with physical access to gain higher privileges than intended. There is no indication of remote exploitation or need for user interaction. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The vendor has referenced patch IDs related to this issue, but no official fix or remediation level is stated in the available data. Until an official patch is confirmed, restrict physical access to affected devices to mitigate risk.
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: 6a700181bf32cb7a34d5c9e2
Added to database: 08/03/2026, 02:48:33 UTC
Last enriched: 08/03/2026, 03:24:42 UTC
Last updated: 08/03/2026, 03:37:47 UTC
Views: 2
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