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CVE-2026-20534 is an out-of-bounds read vulnerability in MediaTek chipsets' modem component caused by an incorrect bounds check. This flaw could allow a remote denial of service if a user equipment (UE) connects to a rogue base station controlled by an attacker. Exploitation does not require additional privileges or user interaction. Multiple MediaTek chipset models are affected.

The vulnerability identified as CVE-2026-20534 involves an out-of-bounds read in the modem of MediaTek chipsets due to an incorrect bounds check. This flaw can be triggered remotely by an attacker controlling a rogue base station to cause a denial of service condition on the affected device. No additional execution privileges or user interaction are required for exploitation. The issue is tracked under MediaTek's internal ID MSV-9155 and patch ID MOLY01797547. A wide range of MediaTek chipset models are affected, including MT2716, MT2735, MT6739, MT6761, MT6762, MT6763, MT6765, MT6767, MT6768, MT6769, MT6771, MT6779, MT6781, MT6783, MT6785, MT6789, MT6813, MT6833, MT6853, MT6855, MT6873, MT6880, MT6890, MT6980, MT6990, MT8666, MT8675, MT8755, MT8765, MT8771, MT8781, MT8786, MT8791, MT8796, MT8863, MT8873, MT8883, and MT8893 among others. No CVSS score is provided, and no known exploits in the wild have been reported.

CVE-2026-20534 is an out-of-bounds read vulnerability in MediaTek chipsets' modem component caused by an incorrect bounds check. This flaw could allow a remote denial of service if a user equipment (UE) connects to a rogue base station controlled by an attacker. Exploitation does not require additio

CVE-2026-20534: CWE-125 Out-of-bounds Read in MediaTek, Inc. MediaTek chipset

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