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    February 2026
    Product Security Bulletin

    Published 2026-02-02

    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-2026-20420, CVE-2026-20401, CVE-2026-20402, CVE-2026-20421, CVE-2026-20422, CVE-2026-20403, CVE-2026-20404, CVE-2026-20405, CVE-2026-20406, CVE-2026-20407, CVE-2026-20408
    Medium CVE-2026-20409, CVE-2026-20410, CVE-2026-20411, CVE-2026-20412, CVE-2026-20413, CVE-2026-20414, CVE-2026-20415, CVE-2026-20417, CVE-2026-20418, CVE-2026-20419

    Details

    CVE CVE-2026-20420
    Subcomponent Modem
    Severity High
    CWE CWE-125 Out-of-bounds Read
    Description There is a possible system crash due to incorrect error handling.
    Affected Chipsets MT2735, MT2737, MT6813, MT6815, MT6833, MT6835, MT6853, MT6855, MT6858, MT6873, MT6875, MT6877, MT6878, MT6879, MT6880, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6896, MT6897, MT6899, MT6980, MT6983, MT6985, MT6986, MT6989, MT6990, MT6991, MT6993, MT8676, MT8791
    Report Source External

    CVE CVE-2026-20401
    Subcomponent Modem
    Severity High
    CWE CWE-617 Reachable Assertion
    Description There is a possible system crash due to an uncaught exception.
    Affected Chipsets MT2735, MT6833, MT6853, MT6855, MT6873, MT6875, MT6877, MT6880, MT6883, MT6885, MT6889, MT6890, MT6891, MT6893, MT8675, MT8771, MT8791, MT8791T, MT8797
    Report Source External

    CVE CVE-2026-20402
    Subcomponent Modem
    Severity High
    CWE CWE-787 Out-of-bounds Write
    Description There is a possible system crash due to improper input validation.
    Affected Chipsets MT2735, MT6833, MT6853, MT6855, MT6873, MT6875, MT6877, MT6880, MT6883, MT6885, MT6889, MT6890, MT6891, MT6893, MT8675, MT8771, MT8791, MT8791T, MT8797
    Report Source External

    CVE CVE-2026-20421
    Subcomponent Modem
    Severity High
    CWE CWE-125 Out-of-bounds Read
    Description There is a possible system crash due to improper input validation.
    Affected Chipsets MT2735, MT6833, MT6853, MT6855, MT6873, MT6875, MT6877, MT6880, MT6883, MT6885, MT6889, MT6890, MT6891, MT6893, MT8791
    Report Source External

    CVE CVE-2026-20422
    Subcomponent Modem
    Severity High
    CWE CWE-617 Reachable Assertion
    Description There is a possible system crash due to improper input validation.
    Affected Chipsets MT2735, MT2737, MT6813, MT6815, MT6833, MT6835, MT6853, MT6855, MT6858, MT6873, MT6875, MT6877, MT6878, MT6879, MT6880, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6896, MT6897, MT6899, MT6980, MT6983, MT6985, MT6986, MT6989, MT6990, MT6991, MT6993, MT8668, MT8673, MT8675, MT8676, MT8678, MT8755, MT8771, MT8775, MT8791, MT8791T, MT8792, MT8793, MT8795T, MT8797, MT8798, MT8863, MT8873, MT8883, MT8893
    Report Source External

    CVE CVE-2026-20403
    Subcomponent Modem
    Severity High
    CWE CWE-787 Out-of-bounds Write
    Description There is a possible system crash due to a missing bounds check.
    Affected Chipsets MT2735, MT2737, MT6813, MT6815, MT6833, MT6835, MT6853, MT6855, MT6873, MT6875, MT6877, MT6878, MT6879, MT6880, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6896, MT6897, MT6899, MT6980, MT6983, MT6985, MT6989, MT6990, MT6991, MT6993, MT8673, MT8675, MT8676, MT8771, MT8791, MT8791T, MT8795T, MT8797, MT8798, MT8893
    Report Source External

    CVE CVE-2026-20404
    Subcomponent Modem
    Severity High
    CWE CWE-787 Out-of-bounds Write
    Description There is a possible system crash due to improper input validation.
    Affected Chipsets MT2735, MT2737, MT6813, MT6815, MT6833, MT6835, MT6853, MT6855, MT6858, MT6873, MT6875, MT6877, MT6878, MT6879, MT6880, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6896, MT6897, MT6899, MT6980, MT6983, MT6985, MT6986, MT6989, MT6990, MT6991, MT6993, MT8668, MT8673, MT8675, MT8676, MT8678, MT8755, MT8771, MT8791, MT8791T, MT8792, MT8793, MT8795T, MT8797, MT8798, MT8863, MT8873, MT8883, MT8893
    Report Source External

    CVE CVE-2026-20405
    Subcomponent Modem
    Severity High
    CWE CWE-617 Reachable Assertion
    Description There is a possible system crash due to a missing bounds check.
    Affected Chipsets MT2735, MT2737, MT6813, MT6815, MT6833, MT6835, MT6853, MT6855, MT6858, MT6873, MT6875, MT6877, MT6878, MT6879, MT6880, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6896, MT6897, MT6899, MT6980, MT6983, MT6985, MT6986, MT6989, MT6990, MT6991, MT6993, MT8668, MT8673, MT8675, MT8676, MT8678, MT8755, MT8771, MT8791, MT8791T, MT8792, MT8793, MT8795T, MT8797, MT8798, MT8863, MT8873, MT8883, MT8893
    Report Source External

    CVE CVE-2026-20406
    Subcomponent Modem
    Severity High
    CWE CWE-770 Allocation of Resources Without Limits or Throttling
    Description There is a possible system crash due to an uncaught exception.
    Affected Chipsets MT2735, MT2737, MT6813, MT6815, MT6833, MT6835, MT6853, MT6855, MT6858, MT6873, MT6875, MT6877, MT6878, MT6879, MT6880, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6896, MT6897, MT6899, MT6980, MT6983, MT6985, MT6986, MT6989, MT6990, MT6991, MT6993, MT8668, MT8673, MT8675, MT8676, MT8678, MT8755, MT8771, MT8791, MT8791T, MT8792, MT8793, MT8795T, MT8797, MT8798, MT8863, MT8873, MT8883, MT8893
    Report Source External

    CVE CVE-2026-20407
    Subcomponent wlan
    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 MT7902, MT7920, MT7921, MT7922, MT7925, MT7927
    Report Source External

    CVE CVE-2026-20408
    Subcomponent wlan
    Severity High
    CWE CWE-122 Heap Overflow
    Description There is a possible out of bounds write due to a heap buffer overflow.
    Affected Chipsets MT6890, MT7615, MT7915, MT7916, MT7981, MT7986
    Report Source External

    CVE CVE-2026-20409
    Subcomponent imgsys
    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 MT6897, MT6989
    Report Source External

    CVE CVE-2026-20410
    Subcomponent imgsys
    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 MT6897, MT6989, MT8370, MT8390, MT8395
    Report Source External

    CVE CVE-2026-20411
    Subcomponent cameraisp
    Severity Medium
    CWE CWE-416 Use After Free
    Description There is a possible escalation of privilege due to use after free.
    Affected Chipsets MT6878, MT6879, MT6881, MT6886, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8168, MT8188, MT8195, MT8365, MT8370, MT8390, MT8395, MT8666, MT8667, MT8673, MT8676, MT8793
    Report Source External

    CVE CVE-2026-20412
    Subcomponent cameraisp
    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 MT6878, MT6879, MT6881, MT6886, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT6993, MT8168, MT8188, MT8195, MT8365, MT8390, MT8395, MT8666, MT8667, MT8673, MT8676, MT8696, MT8793
    Report Source External

    CVE CVE-2026-20413
    Subcomponent imgsys
    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 MT6899, MT6991, MT8678, MT8793
    Report Source External

    CVE CVE-2026-20414
    Subcomponent imgsys
    Severity Medium
    CWE CWE-416 Use After Free
    Description There is a possible escalation of privilege due to use after free.
    Affected Chipsets MT6897, MT6989, MT8196, MT8678, MT8766, MT8768, MT8786, MT8796
    Report Source External

    CVE CVE-2026-20415
    Subcomponent imgsys
    Severity Medium
    CWE CWE-415 Double Free
    Description There is a possible memory corruption due to improper locking.
    Affected Chipsets MT6897, MT6989
    Report Source External

    CVE CVE-2026-20417
    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, MT8678
    Report Source External

    CVE CVE-2026-20418
    Subcomponent Thread
    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 MT7931, MT7933
    Report Source External

    CVE CVE-2026-20419
    Subcomponent wlan
    Severity Medium
    CWE CWE-754 Improper Check for Unusual or Exceptional Conditions
    Description There is a possible system becoming irresponsive due to an uncaught exception.
    Affected Chipsets MT6890, MT6989TB, MT7902, MT7915, MT7916, MT7920, MT7921, MT7922, MT7925, MT7927, MT7981, MT7986, MT8196, MT8668, MT8676, MT8678, MT8775, MT8791T, MT8792, MT8793, MT8796, MT8873, MT8883, MT8893, MT8910
    Report Source Internal

    Versions

    Version Date Description
    1.0 February 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.