CVE-2026-20491: CWE-787 Out-of-bounds Write in MediaTek, Inc. MediaTek chipset
CVE-2026-20491 is an out-of-bounds write vulnerability in MediaTek chipsets caused by an incorrect bounds check. It requires local user privileges to exploit and does not require user interaction. Successful exploitation can lead to a denial of service condition. The affected chipsets include MT2735, MT2737, MT6890, MT6988, and MT6990. The vulnerability has a medium severity rating with a CVSS score of 5.5.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-20491) involves an out-of-bounds write in MediaTek chipsets due to improper bounds checking. It allows a local user with execution privileges to cause a denial of service without needing user interaction. The issue affects specific MediaTek chipset models: MT2735, MT2737, MT6890, MT6988, and MT6990. No official remediation level or patch information is provided in the available data. The CVSS 3.1 vector indicates low attack complexity and privileges required, no confidentiality or integrity impact, but a high impact on availability.
Potential Impact
Exploitation of this vulnerability can cause a local denial of service on affected MediaTek chipsets. There is no reported impact on confidentiality or integrity. The attack requires local user privileges but no user interaction is needed.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation is documented in the provided data. Users and administrators should monitor MediaTek advisories for updates and apply patches when available.
CVE-2026-20491: CWE-787 Out-of-bounds Write in MediaTek, Inc. MediaTek chipset
Description
CVE-2026-20491 is an out-of-bounds write vulnerability in MediaTek chipsets caused by an incorrect bounds check. It requires local user privileges to exploit and does not require user interaction. Successful exploitation can lead to a denial of service condition. The affected chipsets include MT2735, MT2737, MT6890, MT6988, and MT6990. The vulnerability has a medium severity rating with a CVSS score of 5.5.
CVSS v3.1
Score 5.5medium
Affected software
MediaTek, Inc.
MediaTek chipset
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-20491) involves an out-of-bounds write in MediaTek chipsets due to improper bounds checking. It allows a local user with execution privileges to cause a denial of service without needing user interaction. The issue affects specific MediaTek chipset models: MT2735, MT2737, MT6890, MT6988, and MT6990. No official remediation level or patch information is provided in the available data. The CVSS 3.1 vector indicates low attack complexity and privileges required, no confidentiality or integrity impact, but a high impact on availability.
Potential Impact
Exploitation of this vulnerability can cause a local denial of service on affected MediaTek chipsets. There is no reported impact on confidentiality or integrity. The attack requires local user privileges but no user interaction is needed.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation is documented in the provided data. Users and administrators should monitor MediaTek advisories for updates and apply patches when available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- MediaTek
- Date Reserved
- 2025-11-03T01:30:59.025Z
- State
- PUBLISHED
Threat ID: 6a700184bf32cb7a34d5cace
Added to database: 08/03/2026, 02:48:36 UTC
Last enriched: 08/10/2026, 15:03:36 UTC
Last updated: 09/14/2026, 22:01:32 UTC
Views: 29
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