CVE-2026-20433

State: Published
Severity: 8.8 High
Published: Apr 7, 2026
Updated: Apr 8, 2026
Reserved: Nov 3, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
MediaTek chipsetMediaTek, Inc.	MT2735Affected MT2737Affected MT6813Affected MT6833Affected MT6833PAffected MT6835Affected MT6835TAffected MT6853Affected MT6853TAffected MT6855Affected MT6855TAffected MT6873Affected MT6875Affected MT6875TAffected MT6877Affected MT6877TAffected MT6877TTAffected MT6878Affected MT6878MAffected MT6879Affected MT6880Affected MT6883Affected MT6885Affected MT6886Affected MT6889Affected and 37 more versions

Product

Versions

MediaTek chipsetMediaTek, Inc.

MT2735Affected
MT2737Affected
MT6813Affected
MT6833Affected
MT6833PAffected
MT6835Affected
MT6835TAffected
MT6853Affected
MT6853TAffected
MT6855Affected
MT6855TAffected
MT6873Affected
MT6875Affected
MT6875TAffected
MT6877Affected
MT6877TAffected
MT6877TTAffected
MT6878Affected
MT6878MAffected
MT6879Affected
MT6880Affected
MT6883Affected
MT6885Affected
MT6886Affected
MT6889Affected
and 37 more versions

References

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

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.