CVE-2026-20434 — MediaTek, Inc. / MediaTek chipset

Description (CNA)

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 needed for exploitation. Patch ID: MOLY00782946; Issue ID: MSV-4135.

Affected (CNA)

Vendor / product	Versions
MediaTek, Inc. / MediaTek chipset	affected MT2735; affected MT2737; affected MT6739; affected MT6761; affected MT6762; affected MT6762D; affected MT6762M; affected MT6763; affected MT6765; affected MT6765T; affected MT6767; affected MT6768; affected MT6769; affected MT6769K; affected MT6769S; affected MT6769T; affected MT6769Z; affected MT6771; affected MT6779; affected MT6781; affected MT6783; affected MT6785; affected MT6785T; affected MT6785U; affected MT6789; affected MT6833; affected MT6833P; affected MT6835; affected MT6835T; affected MT6853; affected MT6853T; affected MT6855; affected MT6855T; affected MT6873; affected MT6875; affected MT6875T; affected MT6877; affected MT6877T; affected MT6877TT; affected MT6878; affected MT6878M; affected MT6879; affected MT6880; affected MT6883; affected MT6885; affected MT6886; affected MT6889; affected MT6890; affected MT6891; affected MT6893; affected MT6895; affected MT6895TT; affected MT6896; affected MT6897; affected MT6899; affected MT6980; affected MT6980D; affected MT6983; affected MT6983T; affected MT6985; affected MT6985T; affected MT6989; affected MT6989T; affected MT6990; affected MT6991; affected MT8666; affected MT8667; affected MT8668; affected MT8673; affected MT8675; affected MT8676; affected MT8678; affected MT8755; affected MT8765; affected MT8766; affected MT8766R; affected MT8768; affected MT8771; affected MT8781; affected MT8786; affected MT8788; affected MT8788E; affected MT8789; affected MT8791; affected MT8791T; affected MT8792; affected MT8793; affected MT8795T; affected MT8797; affected MT8798; affected MT8863; affected MT8873; affected MT8883; affected MT8893

Vendor / product

Versions

MediaTek, Inc. / MediaTek chipset

affected MT2735; affected MT2737; affected MT6739; affected MT6761; affected MT6762; affected MT6762D; affected MT6762M; affected MT6763; affected MT6765; affected MT6765T; affected MT6767; affected MT6768; affected MT6769; affected MT6769K; affected MT6769S; affected MT6769T; affected MT6769Z; affected MT6771; affected MT6779; affected MT6781; affected MT6783; affected MT6785; affected MT6785T; affected MT6785U; affected MT6789; affected MT6833; affected MT6833P; affected MT6835; affected MT6835T; affected MT6853; affected MT6853T; affected MT6855; affected MT6855T; affected MT6873; affected MT6875; affected MT6875T; affected MT6877; affected MT6877T; affected MT6877TT; affected MT6878; affected MT6878M; affected MT6879; affected MT6880; affected MT6883; affected MT6885; affected MT6886; affected MT6889; affected MT6890; affected MT6891; affected MT6893; affected MT6895; affected MT6895TT; affected MT6896; affected MT6897; affected MT6899; affected MT6980; affected MT6980D; affected MT6983; affected MT6983T; affected MT6985; affected MT6985T; affected MT6989; affected MT6989T; affected MT6990; affected MT6991; affected MT8666; affected MT8667; affected MT8668; affected MT8673; affected MT8675; affected MT8676; affected MT8678; affected MT8755; affected MT8765; affected MT8766; affected MT8766R; affected MT8768; affected MT8771; affected MT8781; affected MT8786; affected MT8788; affected MT8788E; affected MT8789; affected MT8791; affected MT8791T; affected MT8792; affected MT8793; affected MT8795T; affected MT8797; affected MT8798; affected MT8863; affected MT8873; affected MT8883; affected MT8893

CWE

CWE-787

References

https://corp.mediatek.com/product-security-bulletin/March-2026

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.