Is CVE-2026-20433 actively exploited?

CVE-2026-20433 has no public evidence of in-the-wild exploitation as of 2026-04-10.

What is the CVSS score for CVE-2026-20433?

CVE-2026-20433 has a CVSS score of 8.8 (HIGH severity). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2026-20433?

Patch guidance is available from mediatek security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-20433.

Fix CVE-2026-20433 - HIGH mediatek mt2735 firmware

Q: Which products are affected by CVE-2026-20433?

62 products: mediatek mt2735 firmware, mediatek mt2737 firmware, mediatek mt6813 firmware, mediatek mt6833 firmware, mediatek mt6833p firmware, and 57 more.

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 Metrics

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector: adjacent network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-787 · Out-of-bounds Write CWE-787 · Out-of-bounds Write

Metadata

Primary Vendor: MEDIATEK
Published: 4/7/2026
Last Modified: 4/10/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

mediatek : mt2735_firmwaremediatek : mt2737_firmwaremediatek : mt6813_firmwaremediatek : mt6833_firmwaremediatek : mt6833p_firmwaremediatek : mt6835_firmwaremediatek : mt6835t_firmwaremediatek : mt6853_firmwaremediatek : mt6853t_firmwaremediatek : mt6855_firmwaremediatek : mt6855t_firmwaremediatek : mt6873_firmwaremediatek : mt6875_firmwaremediatek : mt6875t_firmwaremediatek : mt6877_firmwaremediatek : mt6877t_firmwaremediatek : mt6877tt_firmwaremediatek : mt6878_firmwaremediatek : mt6878m_firmwaremediatek : mt6879_firmwaremediatek : mt6880_firmwaremediatek : mt6883_firmwaremediatek : mt6885_firmwaremediatek : mt6886_firmwaremediatek : mt6889_firmwaremediatek : mt6890_firmwaremediatek : mt6891_firmwaremediatek : mt6893_firmwaremediatek : mt6895_firmwaremediatek : mt6895tt_firmwaremediatek : mt6896_firmwaremediatek : mt6897_firmwaremediatek : mt6899_firmwaremediatek : mt6980_firmwaremediatek : mt6980d_firmwaremediatek : mt6983_firmwaremediatek : mt6983t_firmwaremediatek : mt6985_firmwaremediatek : mt6985t_firmwaremediatek : mt6989_firmwaremediatek : mt6989t_firmwaremediatek : mt6990_firmwaremediatek : mt6991_firmwaremediatek : mt8668_firmwaremediatek : mt8673_firmwaremediatek : mt8675_firmwaremediatek : mt8676_firmwaremediatek : mt8678_firmwaremediatek : mt8755_firmwaremediatek : mt8771_firmwaremediatek : mt8775_firmwaremediatek : mt8791_firmwaremediatek : mt8791t_firmwaremediatek : mt8792_firmwaremediatek : mt8793_firmwaremediatek : mt8795t_firmwaremediatek : mt8797_firmwaremediatek : mt8798_firmwaremediatek : mt8863_firmwaremediatek : mt8873_firmwaremediatek : mt8883_firmwaremediatek : mt8893_firmware

Remediation Guidance

Executive Summary

Cite this page

CVE-2026-20433. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2026-20433

View on NIST NVD

CVE-2026-20433 vulnerability