CVE-2026-20520: High severity MediaTek Modem vulnerability
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Patch MOLY01778988
Event History
Frequently Asked Questions
What conditions are required for exploitation?
A user equipment device must connect to a rogue base station controlled by the attacker. No additional execution privileges or user interaction are required.
Who is most exposed to this issue?
Devices using the affected MediaTek Modem are exposed when they can be induced to connect to an attacker-controlled rogue base station. The issue can lead to remote escalation of privilege.
How can I identify the vendor fix for this issue?
The MediaTek patch identifier is MOLY01778988, and the associated issue identifier is MSV-8897.