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 not needed for exploitation. Patch ID: MOLY01778988; Issue ID: MSV-8897.

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity High

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.

The EPSS score is 0.00228.

Exploitation none

Automatable no

Technical Impact total

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
MT2716 affected —
MT2735 affected —
MT2737 affected —
MT6813 affected —
MT6815 affected —
MT6833 affected —
MT6835 affected —
MT6853 affected —
MT6855 affected —
MT6858 affected —
MT6873 affected —
MT6875 affected —
MT6877 affected —
MT6878 affected —
MT6879 affected —
MT6880 affected —
MT6881 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 —
MT6982 affected —
MT6983 affected —
MT6985 affected —
MT6986 affected —
MT6988 affected —
MT6989 affected —
MT6990 affected —
MT6991 affected —
MT6993 affected —
MT8668 affected —
MT8676 affected —
MT8678 affected —
MT8695 affected —
MT8696 affected —
MT8755 affected —
MT8771 affected —
MT8775 affected —
MT8791 affected —
MT8791T affected —
MT8792 affected —
MT8793 affected —
MT8796 affected —
MT8797 affected —
MT8798 affected —
MT8863 affected —
MT8873 affected —
MT8883 affected —
MT8893 affected —

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Mediatek Subscribe
Mediatek Chipset Subscribe

Project Subscriptions

Vendors Products
Mediatek Subscribe
Mediatek Chipset Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.mediatek.com/product-security-bulletin/October-2026 cve-icon cve-icon
History

Mon, 05 Oct 2026 12:45:00 +0000

Type Values Removed Values Added
Title Missing Bounds Check in Modem Firmware Leads to Remote Privilege Escalation

Mon, 05 Oct 2026 11:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:A/AC:H/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'}

Mon, 05 Oct 2026 05:00:00 +0000

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

Mon, 05 Oct 2026 03:45:00 +0000

Type Values Removed Values Added
Title Missing Bounds Check in Modem Firmware Leads to Remote Privilege Escalation

Mon, 05 Oct 2026 02:15:00 +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 not needed for exploitation. Patch ID: MOLY01778988; Issue ID: MSV-8897.
Weaknesses CWE-787
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: MediaTek

Published:

Updated: 2026-10-06T03:55:48.797Z

Reserved: 2025-11-03T01:30:59.032Z

Link: CVE-2026-20520

cve-icon Vulnrichment

Updated: 2026-10-05T10:32:43.332Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-05T02:16:50.540

Modified: 2026-10-06T15:05:34.080

Link: CVE-2026-20520

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-05T12:30:15Z

Weaknesses