PT-2026-1366 · Modem · Modem

Published 2026-01-06 · Updated 2026-01-29 · CVE-2025-20761

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 flaw exists in Modem that may cause a system crash due to improper error handling. This could result in a remote denial of service if a User Equipment (UE) connects to a malicious base station controlled by an attacker. Exploitation does not require any user interaction or elevated privileges.

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

DoS

Improper Check for Exceptional Conditions

Weakness Enumeration

CWE-754

Related Identifiers

CVE-2025-20761

Affected Products

Modem

References · 5

• https://corp.mediatek.com/product-security-bulletin/January-2026 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-20761 · Security Note
• https://reddit.com/r/GalaxyS21/comments/1qqh2tt/s21_firmware_security_update_downloaded_in_usa · Reddit Post
• https://twitter.com/CVEnew/status/2008391026189516973 · Twitter Post
• https://t.me/cveNotify/147794 · Telegram Post