CVE-2026-20460

Modem Firmware Improper Input Validation Leading to Remote Information Disclosure

Published Jul 1, 2026 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed

Description

In Modem, there is a possible information disclosure due to improper input validation. This could lead to remote information disclosure, 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: MOLY01811421; Issue ID: MSV-6788.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

MediaTek, Inc.

MediaTek chipset

unaffected

Version	Status	Constraints
`MT2735`	affected	—
`MT2737`	affected	—
`MT6779`	affected	—
`MT6781`	affected	—
`MT6783`	affected	—
`MT6785`	affected	—
`MT6789`	affected	—
`MT6813`	affected	—
`MT6833`	affected	—
`MT6835`	affected	—
`MT6853`	affected	—
`MT6855`	affected	—
`MT6858`	affected	—
`MT6873`	affected	—
`MT6875`	affected	—
`MT6877`	affected	—
`MT6878`	affected	—
`MT6879`	affected	—
`MT6880`	affected	—
`MT6883`	affected	—
`MT6885`	affected	—
`MT6886`	affected	—
`MT6889`	affected	—
`MT6890`	affected	—
`MT6891`	affected	—
`MT6893`	affected	—
`MT6895`	affected	—
`MT6896`	affected	—
`MT6897`	affected	—
`MT6899`	affected	—
`MT6980`	affected	—
`MT6983`	affected	—
`MT6985`	affected	—
`MT6986D`	affected	—
`MT6988`	affected	—
`MT6989`	affected	—
`MT6990`	affected	—
`MT6991`	affected	—
`MT6993`	affected	—
`MT8673`	affected	—
`MT8675`	affected	—
`MT8676`	affected	—
`MT8678`	affected	—
`MT8755`	affected	—
`MT8765`	affected	—
`MT8766`	affected	—
`MT8766R`	affected	—
`MT8768`	affected	—
`MT8771`	affected	—
`MT8775`	affected	—
`MT8781`	affected	—
`MT8786`	affected	—
`MT8788`	affected	—
`MT8788E`	affected	—
`MT8789`	affected	—
`MT8791`	affected	—
`MT8791T`	affected	—
`MT8792`	affected	—
`MT8793`	affected	—
`MT8795T`	affected	—
`MT8796`	affected	—
`MT8797`	affected	—
`MT8798`	affected	—
`MT8863`	affected	—
`MT8873`	affected	—
`MT8883`	affected	—
`MT8893`	affected	—

No data.

Vendor Product Versions

Mediatek, Inc.

Mediatek Chipset

Version	Status	Scheme	Platform
`MT2735`	affected	generic	—
`MT2737`	affected	generic	—
`MT6779`	affected	generic	—
`MT6781`	affected	generic	—
`MT6783`	affected	generic	—
`MT6785`	affected	generic	—
`MT6789`	affected	generic	—
`MT6813`	affected	generic	—
`MT6833`	affected	generic	—
`MT6835`	affected	generic	—
`MT6853`	affected	generic	—
`MT6855`	affected	generic	—
`MT6858`	affected	generic	—
`MT6873`	affected	generic	—
`MT6875`	affected	generic	—
`MT6877`	affected	generic	—
`MT6878`	affected	generic	—
`MT6879`	affected	generic	—
`MT6880`	affected	generic	—
`MT6883`	affected	generic	—
`MT6885`	affected	generic	—
`MT6886`	affected	generic	—
`MT6889`	affected	generic	—
`MT6890`	affected	generic	—
`MT6891`	affected	generic	—
`MT6893`	affected	generic	—
`MT6895`	affected	generic	—
`MT6896`	affected	generic	—
`MT6897`	affected	generic	—
`MT6899`	affected	generic	—
`MT6980`	affected	generic	—
`MT6983`	affected	generic	—
`MT6985`	affected	generic	—
`MT6986D`	affected	generic	—
`MT6988`	affected	generic	—
`MT6989`	affected	generic	—
`MT6990`	affected	generic	—
`MT6991`	affected	generic	—
`MT6993`	affected	generic	—
`MT8673`	affected	generic	—
`MT8675`	affected	generic	—
`MT8676`	affected	generic	—
`MT8678`	affected	generic	—
`MT8755`	affected	generic	—
`MT8765`	affected	generic	—
`MT8766`	affected	generic	—
`MT8766R`	affected	generic	—
`MT8768`	affected	generic	—
`MT8771`	affected	generic	—
`MT8775`	affected	generic	—
`MT8781`	affected	generic	—
`MT8786`	affected	generic	—
`MT8788`	affected	generic	—
`MT8788E`	affected	generic	—
`MT8789`	affected	generic	—
`MT8791`	affected	generic	—
`MT8791T`	affected	generic	—
`MT8792`	affected	generic	—
`MT8793`	affected	generic	—
`MT8795T`	affected	generic	—
`MT8796`	affected	generic	—
`MT8797`	affected	generic	—
`MT8798`	affected	generic	—
`MT8863`	affected	generic	—
`MT8873`	affected	generic	—
`MT8883`	affected	generic	—
`MT8893`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.264% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

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

History

Aug 2, 2026 12:15 AM Title updated View changes

Type	Values Removed	Values Added
Title		Modem Firmware Improper Input Validation Leading to Remote Information Disclosure

Jul 29, 2026 10:00 PM Title updated View changes

Type	Values Removed	Values Added
Title	Modem Component Improper Input Validation Allows Remote Information Disclosure

Jul 24, 2026 6:30 PM Title updated View changes

Type	Values Removed	Values Added
Title		Modem Component Improper Input Validation Allows Remote Information Disclosure

Jul 21, 2026 3:30 PM Title updated View changes

Type	Values Removed	Values Added
Title	Remote Information Disclosure via Improper Modem Input Validation

Jul 15, 2026 11:15 PM Title updated View changes

Type	Values Removed	Values Added
Title		Remote Information Disclosure via Improper Modem Input Validation

Jul 14, 2026 11:30 AM Title updated View changes

Type	Values Removed	Values Added
Title	Improper Input Validation in MediaTek Modem Enables Remote Information Disclosure

Jul 13, 2026 4:45 AM Title updated View changes

Type	Values Removed	Values Added
Title		Improper Input Validation in MediaTek Modem Enables Remote Information Disclosure

Jul 11, 2026 2:15 AM Title updated View changes

Type	Values Removed	Values Added
Title	Modem Firmware Improper Input Validation Leading to Remote Information Disclosure

Jul 9, 2026 2:45 PM Title updated View changes

Type	Values Removed	Values Added
Title		Modem Firmware Improper Input Validation Leading to Remote Information Disclosure

Jul 8, 2026 3:00 AM Title updated View changes

Type	Values Removed	Values Added
Title	MediaTek Modem Firmware Information Disclosure via Rogue Base Station

Jul 7, 2026 9:45 AM Title updated View changes

Type	Values Removed	Values Added
Title		MediaTek Modem Firmware Information Disclosure via Rogue Base Station

Jul 6, 2026 3:45 PM Title updated View changes

Type	Values Removed	Values Added
Title	Modem Firmware Improper Input Validation Enables Remote Information Disclosure

Jul 5, 2026 10:30 PM Title updated View changes

Type	Values Removed	Values Added
Title		Modem Firmware Improper Input Validation Enables Remote Information Disclosure

Jul 4, 2026 10:45 PM Title updated View changes

Type	Values Removed	Values Added
Title	Modem Remote Information Disclosure via Rogue Base Station

Jul 4, 2026 11:30 AM Title updated View changes

Type	Values Removed	Values Added
Title		Modem Remote Information Disclosure via Rogue Base Station

Jul 3, 2026 11:15 PM Title updated View changes

Type	Values Removed	Values Added
Title	MediaTek Modem Firmware Remote Information Disclosure via Rogue Base Station

Jul 3, 2026 12:00 PM Title updated View changes

Type	Values Removed	Values Added
Title		MediaTek Modem Firmware Remote Information Disclosure via Rogue Base Station

Jul 3, 2026 5:00 AM Title updated View changes

Type	Values Removed	Values Added
Title	Remote Information Disclosure via Improper Input Validation in MediaTek Modem Firmware

Jul 2, 2026 10:15 PM Title updated View changes

Type	Values Removed	Values Added
Title		Remote Information Disclosure via Improper Input Validation in MediaTek Modem Firmware

Jul 2, 2026 2:00 PM Title updated View changes

Type	Values Removed	Values Added
Title	MediaTek Modem Remote Information Disclosure via Improper Input Validation

Jul 2, 2026 8:30 AM Title updated View changes

Type	Values Removed	Values Added
Title		MediaTek Modem Remote Information Disclosure via Improper Input Validation

Jul 2, 2026 1:45 AM Title updated View changes

Type	Values Removed	Values Added
Title	Improper Input Validation Enables Remote Information Disclosure in MediaTek Modem

Jul 1, 2026 10:00 PM Title updated View changes

Type	Values Removed	Values Added
Title		Improper Input Validation Enables Remote Information Disclosure in MediaTek Modem

Jul 1, 2026 5:30 PM Title updated View changes

Type	Values Removed	Values Added
Title	Modem Firmware Improper Input Validation Leading to Remote Information Disclosure

Jul 1, 2026 3:30 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Mediatek, Inc. Mediatek, Inc. mediatek Chipset
Vendors & Products		Mediatek, Inc. Mediatek, Inc. mediatek Chipset

Jul 1, 2026 11:30 AM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 5.3, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Jul 1, 2026 9:15 AM Title updated View changes

Type	Values Removed	Values Added
Title		Modem Firmware Improper Input Validation Leading to Remote Information Disclosure

Jul 1, 2026 3:30 AM Description updated. Weaknesses updated. Added references View changes

Type	Values Removed	Values Added
Description		In Modem, there is a possible information disclosure due to improper input validation. This could lead to remote information disclosure, 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: MOLY01811421; Issue ID: MSV-6788.
Weaknesses		CWE-288
References		https://corp.mediatek.com/product-security-bulletin/July-2026