CVE-2026-20557 PUBLISHED

Assigner: MediaTek
Reserved: 03.11.2025 Published: 02.11.2026 Updated: 02.11.2026

In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, 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: MOLY01877236; Issue ID: MSV-9804.

Product Status

Vendor MediaTek, Inc.
Product MediaTek chipset
Versions Default: unaffected
  • Version MT2716 is affected
  • Version MT6813 is affected
  • Version MT6815 is affected
  • Version MT6835 is affected
  • Version MT6858 is affected
  • Version MT6878 is affected
  • Version MT6881 is affected
  • Version MT6897 is affected
  • Version MT6899 is affected
  • Version MT6982 is affected
  • Version MT6986 is affected
  • Version MT6988 is affected
  • Version MT6991 is affected
  • Version MT6993 is affected
  • Version MT8668 is affected
  • Version MT8676 is affected
  • Version MT8678 is affected
  • Version MT8755 is affected
  • Version MT8775 is affected
  • Version MT8792 is affected
  • Version MT8793 is affected
  • Version MT8863 is affected
  • Version MT8873 is affected
  • Version MT8875 is affected
  • Version MT8883 is affected

References

Problem Types

  • CWE-787 Out-of-bounds Write CWE