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    CVE-2026-20421

    In Modem, there is a possible system crash due to improper input validation. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01738293; Issue ID: MSV-5922.

    Published:Feb 2, 2026
    Last Modified:Apr 16, 2026
    EPS:Feb 2, 2026
    EPSS Score:0.00071
    CVSS Score:6.5

    Affected Products

    Vendor
    Mediatek
    Product
    Mt2735
    Vendor
    Mediatek
    Product
    Mt6833
    Vendor
    Mediatek
    Product
    Mt6853
    Vendor
    Mediatek
    Product
    Mt6855
    Vendor
    Mediatek
    Product
    Mt6873
    Vendor
    Mediatek
    Product
    Mt6875
    Vendor
    Mediatek
    Product
    Mt6877
    Vendor
    Mediatek
    Product
    Mt6880
    Vendor
    Mediatek
    Product
    Mt6883
    Vendor
    Mediatek
    Product
    Mt6885
    Vendor
    Mediatek
    Product
    Mt6889
    Vendor
    Mediatek
    Product
    Mt6890
    Vendor
    Mediatek
    Product
    Mt6891
    Vendor
    Mediatek
    Product
    Mt6893
    Vendor
    Mediatek
    Product
    Mt8791
    Vendor
    Mediatek
    Product
    Nr15

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High