CVE-2026-20421: MediaTek NR15

Medium severity, CVSS 6.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In Modem, there is a possible system crash due to improper input validation. This could lead to remote denial of service, 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: MOLY01738293; Issue ID: MSV-5922.

Affected products

• MediaTek NR15: affected versions not specified

Published 2026-02-02. Last modified 2026-06-17.