PT-2026-5626 · Modem · Modem

Published 2026-02-02 · Updated 2026-02-08 · CVE-2026-20403

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Modem (affected versions not specified)

Description A missing bounds check in the Modem software could lead to a system crash and a remote denial of service. This scenario occurs if a User Equipment (UE) connects to a rogue base station controlled by an attacker. No additional execution privileges or user interaction are required for exploitation.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-20403

Affected Products

Modem

References · 7

• https://corp.mediatek.com/product-security-bulletin/February-2026 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-20403 · Security Note
• https://twitter.com/CVEnew/status/2018249242016727213 · Twitter Post
• https://twitter.com/cracbot/status/2020090219278778498 · Twitter Post
• https://t.me/CVEtracker/43464 · Telegram Post
• https://t.me/cveNotify/150842 · Telegram Post
• https://twitter.com/transilienceai/status/2020377220292731325 · Twitter Post