CVE-2026-20433
Out-of-Bounds Write in Modem Enables Remote Privilege Escalation
Publication date: 2026-04-07
Last updated on: 2026-04-10
Assigner: MediaTek, Inc.
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mediatek | mt2735_firmware | * |
| mediatek | mt2737_firmware | * |
| mediatek | mt6813_firmware | * |
| mediatek | mt6833_firmware | * |
| mediatek | mt6833p_firmware | * |
| mediatek | mt6835_firmware | * |
| mediatek | mt6835t_firmware | * |
| mediatek | mt6853_firmware | * |
| mediatek | mt6853t_firmware | * |
| mediatek | mt6855_firmware | * |
| mediatek | mt6855t_firmware | * |
| mediatek | mt6873_firmware | * |
| mediatek | mt6875_firmware | * |
| mediatek | mt6875t_firmware | * |
| mediatek | mt6877_firmware | * |
| mediatek | mt6877t_firmware | * |
| mediatek | mt6877tt_firmware | * |
| mediatek | mt6878_firmware | * |
| mediatek | mt6878m_firmware | * |
| mediatek | mt6879_firmware | * |
| mediatek | mt6880_firmware | * |
| mediatek | mt6883_firmware | * |
| mediatek | mt6885_firmware | * |
| mediatek | mt6886_firmware | * |
| mediatek | mt6889_firmware | * |
| mediatek | mt6890_firmware | * |
| mediatek | mt6891_firmware | * |
| mediatek | mt6893_firmware | * |
| mediatek | mt6895_firmware | * |
| mediatek | mt6895tt_firmware | * |
| mediatek | mt6896_firmware | * |
| mediatek | mt6897_firmware | * |
| mediatek | mt6899_firmware | * |
| mediatek | mt6980_firmware | * |
| mediatek | mt6980d_firmware | * |
| mediatek | mt6983_firmware | * |
| mediatek | mt6983t_firmware | * |
| mediatek | mt6985_firmware | * |
| mediatek | mt6985t_firmware | * |
| mediatek | mt6989_firmware | * |
| mediatek | mt6989t_firmware | * |
| mediatek | mt6990_firmware | * |
| mediatek | mt6991_firmware | * |
| mediatek | mt8668_firmware | * |
| mediatek | mt8673_firmware | * |
| mediatek | mt8675_firmware | * |
| mediatek | mt8676_firmware | * |
| mediatek | mt8678_firmware | * |
| mediatek | mt8755_firmware | * |
| mediatek | mt8771_firmware | * |
| mediatek | mt8775_firmware | * |
| mediatek | mt8791_firmware | * |
| mediatek | mt8791t_firmware | * |
| mediatek | mt8792_firmware | * |
| mediatek | mt8793_firmware | * |
| mediatek | mt8795t_firmware | * |
| mediatek | mt8797_firmware | * |
| mediatek | mt8798_firmware | * |
| mediatek | mt8863_firmware | * |
| mediatek | mt8873_firmware | * |
| mediatek | mt8883_firmware | * |
| mediatek | mt8893_firmware | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-787 | The product writes data past the end, or before the beginning, of the intended buffer. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in the modem component where there is a possible out of bounds write caused by a missing bounds check.
An attacker controlling a rogue base station can exploit this vulnerability if a user equipment (UE) connects to it.
Exploitation requires user interaction but does not require any additional execution privileges.
How can this vulnerability impact me? :
The vulnerability can lead to remote escalation of privilege on the affected modem.
This means an attacker could gain higher-level access remotely by tricking a device into connecting to a malicious base station.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, apply the patch identified as MOLY01088681 provided by the vendor.
Avoid connecting to untrusted or rogue base stations to reduce the risk of exploitation.