CVE-2026-20458
Received Received - Intake

Memory Corruption in Modem Due to Missing Bounds Check

Publication date: 2026-07-01

Last updated on: 2026-07-01

Assigner: MediaTek, Inc.

Description
In Modem, there is a possible memory corruption 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 not needed for exploitation. Patch ID: MOLY01402160; Issue ID: MSV-7298.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-07-01
Last Modified
2026-07-01
Generated
2026-07-01
AI Q&A
2026-07-01
EPSS Evaluated
N/A
NVD
CVE-2026-20458
EUVD
EUVD-2026-40871

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mediatek modem *

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Compliance Impact

There is no information provided in the available context or resources regarding the impact of this vulnerability on compliance with common standards and regulations such as GDPR or HIPAA.

Executive Summary

This vulnerability exists in the modem component where a missing bounds check can cause memory corruption.

An attacker controlling a rogue base station can exploit this flaw to remotely escalate privileges on a user equipment (UE) device without requiring any additional execution privileges or user interaction.

Impact Analysis

The vulnerability can allow an attacker to remotely escalate privileges on a device connected to a malicious base station.

This means the attacker could gain higher-level access or control over the affected device without the user's knowledge or interaction.

Mitigation Strategies

To mitigate this vulnerability, apply the patch identified as MOLY01402160 provided by the vendor.

Avoid connecting to untrusted or rogue base stations to reduce the risk of exploitation.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-20458. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart