CVE-2026-20458: CWE-787 Out-of-bounds Write in MediaTek, Inc. MediaTek chipset
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.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-20458) is an out-of-bounds write (CWE-787) in the modem of MediaTek chipsets caused by a missing bounds check. It enables remote attackers controlling a rogue base station to escalate privileges on the affected device without user interaction or extra privileges. The issue affects a broad range of MediaTek chipset models. The CVSS v3.1 score is 7.5 (High), reflecting a network attack vector with high impact on confidentiality, integrity, and availability. No official remediation level or patch link is provided in the available data, though a patch ID (MOLY01402160) and issue ID (MSV-7298) are referenced.
Potential Impact
Successful exploitation can lead to remote escalation of privilege on devices using the affected MediaTek chipsets, potentially compromising confidentiality, integrity, and availability of the device. The attack requires the UE to connect to a rogue base station controlled by the attacker but does not require user interaction or additional execution privileges.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The vendor has assigned a patch ID (MOLY01402160), indicating a fix may exist or is in development. Until an official patch or update is confirmed, avoid connecting devices to untrusted or suspicious base stations to reduce exposure.
CVE-2026-20458: CWE-787 Out-of-bounds Write in MediaTek, Inc. MediaTek chipset
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 v3.1
Score 7.5high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-20458) is an out-of-bounds write (CWE-787) in the modem of MediaTek chipsets caused by a missing bounds check. It enables remote attackers controlling a rogue base station to escalate privileges on the affected device without user interaction or extra privileges. The issue affects a broad range of MediaTek chipset models. The CVSS v3.1 score is 7.5 (High), reflecting a network attack vector with high impact on confidentiality, integrity, and availability. No official remediation level or patch link is provided in the available data, though a patch ID (MOLY01402160) and issue ID (MSV-7298) are referenced.
Potential Impact
Successful exploitation can lead to remote escalation of privilege on devices using the affected MediaTek chipsets, potentially compromising confidentiality, integrity, and availability of the device. The attack requires the UE to connect to a rogue base station controlled by the attacker but does not require user interaction or additional execution privileges.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The vendor has assigned a patch ID (MOLY01402160), indicating a fix may exist or is in development. Until an official patch or update is confirmed, avoid connecting devices to untrusted or suspicious base stations to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- MediaTek
- Date Reserved
- 2025-11-03T01:30:59.014Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a448b4d27e9c79719e6c5e4
Added to database: 07/01/2026, 03:36:45 UTC
Last enriched: 07/08/2026, 12:02:34 UTC
Last updated: 08/15/2026, 00:41:11 UTC
Views: 124
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