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CVE-2026-20433

Last refreshed2026-11-02

Status: UPDATED  |  Advisory ID: CVE-2026-20433

Key Details

CVECVE-2026-20433
CVSS Score / Version
8.8 (High) / CVSS v3.1
Updated2026-11-02
CVSS Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Prose
attack vector is adjacent; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products
see table below
Classified as
CWE-787 (Out-of-bounds Write)

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
MediaTekmt2735_firmware
MediaTekmt6833_firmware
MediaTekmt6853_firmware
MediaTekmt6855_firmware
MediaTekmt6873_firmware
MediaTekmt6875_firmware
MediaTekmt6877_firmware
MediaTekmt6880_firmware
MediaTekmt6883_firmware
MediaTekmt6885_firmware
MediaTekmt6889_firmware
MediaTekmt6890_firmware
MediaTekmt6891_firmware
MediaTekmt6893_firmware
MediaTekmt8675_firmware
MediaTekmt8771_firmware
MediaTekmt8791_firmware
MediaTekmt8791t_firmware
MediaTekmt8797_firmware
MediaTek, Inc.MediaTek chipset
MediaTekmt8893_firmware
MediaTekmt6835_firmware
MediaTekmt6878_firmware
MediaTekmt6879_firmware
MediaTekmt6886_firmware
MediaTekmt6895_firmware
MediaTekmt6897_firmware
MediaTekmt6983_firmware
MediaTekmt6985_firmware
MediaTekmt6989_firmware
MediaTekmt6991_firmware
MediaTekmt8775_firmware
MediaTekmt8792_firmware
MediaTekmt8873_firmware
MediaTekmt8883_firmware
MediaTekmt8668_firmware
MediaTekmt8676_firmware
MediaTekmt8678_firmware
MediaTekmt8793_firmware
MediaTekmt2737_firmware
MediaTekmt6813_firmware
MediaTekmt6896_firmware
MediaTekmt6899_firmware
MediaTekmt6980_firmware
MediaTekmt6990_firmware
MediaTekmt8755_firmware
MediaTekmt8798_firmware
MediaTekmt8863_firmware
MediaTekmt6833p_firmware
MediaTekmt6835t_firmware
MediaTekmt6853t_firmware
MediaTekmt6855t_firmware
MediaTekmt6875t_firmware
MediaTekmt6877t_firmware
MediaTekmt6877tt_firmware
MediaTekmt6878m_firmware
MediaTekmt6895tt_firmware
MediaTekmt6980d_firmware
MediaTekmt6983t_firmware
MediaTekmt6985t_firmware
MediaTekmt6989t_firmware
MediaTekmt8673_firmware
MediaTekmt8795t_firmware
SubsystemsGeneral OT
SectorsMultiple

What to Know

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. (NVD)

What to Do

Monitor MediaTek's and MediaTek, Inc.'s web pages for any future patch releases. See vendor advisory link below.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-20433
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-20433
Vendor advisoryhttps://corp.mediatek.com/product-security-bulletin/April-2026

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