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HIGH · 8.8

CVE-2026-20433

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 atta...

Vulnerability Description

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: MOLY01088681; Issue ID: MSV-4460.

CVSS Score

8.8

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
MediatekMt2735 Firmware-
MediatekMt2735-
MediatekMt2737 Firmware-
MediatekMt2737-
MediatekMt6813 Firmware-
MediatekMt6813-
MediatekMt6833 Firmware-
MediatekMt6833-
MediatekMt6833P Firmware-
MediatekMt6833P-
MediatekMt6835 Firmware-
MediatekMt6835-
MediatekMt6835T Firmware-
MediatekMt6835T-
MediatekMt6853 Firmware-
MediatekMt6853-
MediatekMt6853T Firmware-
MediatekMt6853T-
MediatekMt6855 Firmware-
MediatekMt6855-

Related Weaknesses (CWE)

CWE-787

References

FAQ

What is CVE-2026-20433?

CVE-2026-20433 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 atta...

How severe is CVE-2026-20433?

CVE-2026-20433 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-20433?

Check the references section above for vendor advisories and patch information. Affected products include: Mediatek Mt2735 Firmware, Mediatek Mt2735, Mediatek Mt2737 Firmware, Mediatek Mt2737, Mediatek Mt6813 Firmware.