CVE-2026-20476: CWE-787 Out-of-bounds Write in MediaTek, Inc. MediaTek chipset
CVE-2026-20476 is an out-of-bounds read vulnerability in the ccci component of MediaTek chipsets MT6813, MT6986, and MT6988. It arises from a missing bounds check and requires local user privileges to exploit. No user interaction is needed to trigger the issue, which can cause a local denial of service by impacting availability. The vulnerability has a medium severity rating with a CVSS score of 5.5.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds read in the ccci component of MediaTek chipsets MT6813, MT6986, and MT6988 due to a missing bounds check. Exploitation requires local user privileges but no user interaction. The flaw can lead to a denial of service condition by corrupting memory or causing a crash. There is no indication of confidentiality or integrity impact. No patch or official remediation level has been provided yet, and no known exploits are reported in the wild.
Potential Impact
The vulnerability can cause a local denial of service on affected MediaTek chipsets by triggering an out-of-bounds read. It does not impact confidentiality or integrity. Exploitation requires local user privileges but no user interaction, limiting the attack vector to local access scenarios.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is available, restrict local access to trusted users and monitor for unusual behavior related to the ccci component on affected devices.
CVE-2026-20476: CWE-787 Out-of-bounds Write in MediaTek, Inc. MediaTek chipset
Description
CVE-2026-20476 is an out-of-bounds read vulnerability in the ccci component of MediaTek chipsets MT6813, MT6986, and MT6988. It arises from a missing bounds check and requires local user privileges to exploit. No user interaction is needed to trigger the issue, which can cause a local denial of service by impacting availability. 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 involves an out-of-bounds read in the ccci component of MediaTek chipsets MT6813, MT6986, and MT6988 due to a missing bounds check. Exploitation requires local user privileges but no user interaction. The flaw can lead to a denial of service condition by corrupting memory or causing a crash. There is no indication of confidentiality or integrity impact. No patch or official remediation level has been provided yet, and no known exploits are reported in the wild.
Potential Impact
The vulnerability can cause a local denial of service on affected MediaTek chipsets by triggering an out-of-bounds read. It does not impact confidentiality or integrity. Exploitation requires local user privileges but no user interaction, limiting the attack vector to local access scenarios.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is available, restrict local access to trusted users and monitor for unusual behavior related to the ccci component on affected devices.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- MediaTek
- Date Reserved
- 2025-11-03T01:30:59.016Z
- State
- PUBLISHED
Threat ID: 6a700183bf32cb7a34d5ca9a
Added to database: 08/03/2026, 02:48:35 UTC
Last enriched: 08/10/2026, 15:00:23 UTC
Last updated: 09/16/2026, 22:01:33 UTC
Views: 23
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