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    March 2026
    Product Security Bulletin

    Published 2026-03-02

    The MediaTek Product Security Bulletin contains details of security vulnerabilities affecting certain MediaTek chipsets. Device OEMs have been notified of all the issues and the corresponding security patches for at least two months before publication. We take the security of our chipsets and our customers' products very seriously. At this time, we are not aware of any active exploitation of these vulnerabilities in the wild.
    The severity of the identified vulnerabilities was conducted based on the Common Vulnerability Scoring System version 3.1 (CVSS v3.1).

    The MediaTek Product Security Bulletin contains details of security vulnerabilities affecting certain MediaTek chipsets. Device OEMs have been notified of all the issues and the corresponding security patches for at least two months before publication. We take the security of our chipsets and our customers' products very seriously. At this time, we are not aware of any active exploitation of these vulnerabilities in the wild.

    The severity of the identified vulnerabilities was conducted based on the Common Vulnerability Scoring System version 3.1 (CVSS v3.1).

    Summary

    Severity CVEs
    High CVE-2026-20423, CVE-2026-20425, CVE-2026-20426, CVE-2026-20427, CVE-2026-20428, CVE-2026-20430, CVE-2026-20434
    Medium CVE-2026-20435, CVE-2026-20436, CVE-2026-20437, CVE-2026-20438, CVE-2026-20439, CVE-2026-20440, CVE-2026-20441, CVE-2026-20442, CVE-2026-20443, CVE-2026-20444, CVE-2026-20424, CVE-2026-20429, CVE-2026-20445, CVE-2026-20416

    Details

    CVE CVE-2026-20423
    Subcomponent wlan
    Severity High
    CWE CWE-749 Exposed Dangerous Method or Function
    Description There is a possible out of bounds write due to a missing bounds check.
    Affected Chipsets MT7902, MT7920, MT7921, MT7922, MT7925, MT7927
    Report Source External

    CVE CVE-2026-20425
    Subcomponent display
    Severity High
    CWE CWE-787 Out-of-bounds Write
    Description There is a possible out of bounds write due to a missing bounds check.
    Affected Chipsets MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8196, MT8678, MT8793
    Report Source External

    CVE CVE-2026-20426
    Subcomponent display
    Severity High
    CWE CWE-787 Out-of-bounds Write
    Description There is a possible out of bounds write due to a missing bounds check.
    Affected Chipsets MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8196, MT8678, MT8793
    Report Source External

    CVE CVE-2026-20427
    Subcomponent display
    Severity High
    CWE CWE-787 Out-of-bounds Write
    Description There is a possible escalation of privilege due to a missing bounds check.
    Affected Chipsets MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8196, MT8678, MT8793
    Report Source External

    CVE CVE-2026-20428
    Subcomponent display
    Severity High
    CWE CWE-787 Out-of-bounds Write
    Description There is a possible out of bounds write due to a missing bounds check.
    Affected Chipsets MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8196, MT8678, MT8793
    Report Source External

    CVE CVE-2026-20430
    Subcomponent wlan
    Severity High
    CWE CWE-787 Out-of-bounds Write
    Description There is a possible out of bounds write due to an incorrect bounds check.
    Affected Chipsets MT6890, MT7915, MT7916, MT7981, MT7986
    Report Source Internal

    CVE CVE-2026-20434
    Subcomponent Modem
    Severity High
    CWE CWE-787 Out-of-bounds Write
    Description There is a possible out of bounds write due to a missing bounds check.
    Affected Chipsets MT2735, MT2737, MT6739, MT6761, MT6762, MT6762D, MT6762M, MT6763, MT6765, MT6765T, MT6767, MT6768, MT6769, MT6769K, MT6769S, MT6769T, MT6769Z, MT6771, MT6779, MT6781, MT6783, MT6785, MT6785T, MT6785U, MT6789, MT6833, MT6833P, MT6835, MT6835T, MT6853, MT6853T, MT6855, MT6855T, MT6873, MT6875, MT6875T, MT6877, MT6877T, MT6877TT, MT6878, MT6878M, MT6879, MT6880, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6895TT, MT6896, MT6897, MT6899, MT6980, MT6980D, MT6983, MT6983T, MT6985, MT6985T, MT6989, MT6989T, MT6990, MT6991, MT8666, MT8667, MT8668, MT8673, MT8675, MT8676, MT8678, MT8755, MT8765, MT8766, MT8766R, MT8768, MT8771, MT8781, MT8786, MT8788, MT8788E, MT8789, MT8791, MT8791T, MT8792, MT8793, MT8795T, MT8797, MT8798, MT8863, MT8873, MT8883, MT8893
    Report Source Internal

    CVE CVE-2026-20435
    Subcomponent preloader
    Severity Medium
    CWE CWE-522 Insufficiently Protected Credentials
    Description There is a possible read of device unique identifiers due to a logic error.
    Affected Chipsets MT2737, MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6813, MT6833, MT6853, MT6855, MT6877, MT6878, MT6879, MT6880, MT6885, MT6886, MT6890, MT6893, MT6895, MT6897, MT6983, MT6985, MT6989, MT6990, MT6993, MT8169, MT8186, MT8188, MT8370, MT8390, MT8676, MT8678, MT8696, MT8793
    Report Source External

    CVE CVE-2026-20436
    Subcomponent wlan
    Severity Medium
    CWE CWE-120 Classic Buffer Overflow
    Description There is a possible escalation of privilege due to a missing bounds check.
    Affected Chipsets MT7902, MT7920, MT7921, MT7922, MT7925, MT7927, MT8696
    Report Source External

    CVE CVE-2026-20437
    Subcomponent MAE
    Severity Medium
    CWE CWE-416 Use After Free
    Description There is a possible system crash due to use after free.
    Affected Chipsets MT2718, MT6899, MT6991, MT8678, MT8793
    Report Source External

    CVE CVE-2026-20438
    Subcomponent MAE
    Severity Medium
    CWE CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
    Description There is a possible out of bounds write due to a race condition.
    Affected Chipsets MT2718, MT6899, MT6991, MT8168, MT8169, MT8186, MT8188, MT8678, MT8695, MT8696, MT8793
    Report Source External

    CVE CVE-2026-20439
    Subcomponent imgsys
    Severity Medium
    CWE CWE-416 Use After Free
    Description There is a possible system crash due to use after free.
    Affected Chipsets MT2718, MT6899, MT6991, MT8678, MT8793
    Report Source External

    CVE CVE-2026-20440
    Subcomponent MAE
    Severity Medium
    CWE CWE-1285 Specified Index, Position, or Offset
    Description There is a possible out of bounds write due to a missing bounds check.
    Affected Chipsets MT2718, MT6899, MT6991, MT8678, MT8793
    Report Source External

    CVE CVE-2026-20441
    Subcomponent MAE
    Severity Medium
    CWE CWE-787 Out-of-bounds Write
    Description There is a possible out of bounds write due to a missing bounds check.
    Affected Chipsets MT2718, MT6899, MT6991, MT8678, MT8793
    Report Source External

    CVE CVE-2026-20442
    Subcomponent display
    Severity Medium
    CWE CWE-416 Use After Free
    Description There is a possible system crash due to use after free.
    Affected Chipsets MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8186, MT8188, MT8196, MT8667, MT8673, MT8676, MT8678, MT8765, MT8766, MT8768, MT8771, MT8781, MT8791T, MT8792, MT8793, MT8795T, MT8796, MT8798, MT8873, MT8883
    Report Source External

    CVE CVE-2026-20443
    Subcomponent display
    Severity Medium
    CWE CWE-416 Use After Free
    Description There is a possible memory corruption due to use after free.
    Affected Chipsets MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8186, MT8188, MT8196, MT8667, MT8673, MT8676, MT8678, MT8765, MT8766, MT8768, MT8771, MT8781, MT8791T, MT8792, MT8793, MT8795T, MT8796, MT8798, MT8873, MT8883
    Report Source External

    CVE CVE-2026-20444
    Subcomponent display
    Severity Medium
    CWE CWE-787 Out-of-bounds Write
    Description There is a possible memory corruption due to a missing bounds check.
    Affected Chipsets MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8186, MT8188, MT8196, MT8667, MT8673, MT8676, MT8678, MT8765, MT8766, MT8768, MT8771, MT8781, MT8791T, MT8792, MT8793, MT8795T, MT8796, MT8798, MT8873, MT8883
    Report Source External

    CVE CVE-2026-20424
    Subcomponent display
    Severity Medium
    CWE CWE-125 Out-of-bounds Read
    Description There is a possible out of bounds read due to a missing bounds check.
    Affected Chipsets MT6991, MT6993, MT8196, MT8678, MT8793
    Report Source External

    CVE CVE-2026-20429
    Subcomponent display
    Severity Medium
    CWE CWE-125 Out-of-bounds Read
    Description There is a possible out of bounds read due to a missing bounds check.
    Affected Chipsets MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8196, MT8678, MT8793
    Report Source External

    CVE CVE-2026-20445
    Subcomponent MDDP
    Severity Medium
    CWE CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
    Description There is a possible system crash due to a race condition.
    Affected Chipsets MT6835, MT6855, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8188, MT8678, MT8755, MT8771, MT8797, MT8798
    Report Source External

    CVE CVE-2026-20416
    Subcomponent pcie
    Severity Medium
    CWE CWE-787 Out-of-bounds Write
    Description There is a possible out of bounds write due to a missing bounds check.
    Affected Chipsets MT6991, MT6993, MT8188, MT8678
    Report Source External

    Versions

    Version Date Description
    1.0 March 2, 2026 Bulletin published.

    Notes

    Information above is generated only at the time of creation of this Security Bulletin. The list of affected chipsets could be not complete. For any further information, device OEMs can reach your MediaTek contact person if needed.
     
    If you want to report a security vulnerability in MediaTek chipsets or products, please go to Report Security Vulnerability page on MediaTek website.

    Notes

    Information above is generated only at the time of creation of this Security Bulletin. The list of affected chipsets could be not complete. For any further information, device OEMs can reach your MediaTek contact person if needed.
    If you want to report a security vulnerability in MediaTek chipsets or products, please go to Report Security Vulnerability page on MediaTek website.