CVE-2026-20433 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact total

No data.

No data.

No data.

References

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

History

Tue, 07 Apr 2026 15:15:00 +0000

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 8.8, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Tue, 07 Apr 2026 07:15:00 +0000

Type	Values Removed	Values Added
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.
Weaknesses		CWE-787
References		https://corp.mediatek.com/product-security-bulletin/April-2026

MITRE

Status: PUBLISHED

Assigner: MediaTek

Published: 2026-04-07T03:25:32.066Z

Updated: 2026-04-08T03:55:26.543Z

Reserved: 2025-11-03T01:30:59.011Z

Link: CVE-2026-20433

Vulnrichment

Updated: 2026-04-07T13:01:12.942Z

NVD

Status : Undergoing Analysis

Published: 2026-04-07T04:17:12.830

Modified: 2026-04-07T14:16:19.807

Link: CVE-2026-20433

Redhat

No data.

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