PT-2026-22559 · Modem · Modem

Published 2026-03-02 · Updated 2026-03-07 · CVE-2026-20434

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

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

Description The Modem software contains a possible out of bounds write issue due to a missing bounds check. Successful exploitation of this issue could lead to remote escalation of privilege if a User Equipment (UE) connects to a rogue base station controlled by an attacker. No additional execution privileges are needed for exploitation, but user interaction is required.

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

LPE

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-20434

Affected Products

Modem

References · 10

• https://corp.mediatek.com/product-security-bulletin/March-2026 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-20434 · Security Note
• https://twitter.com/infoflowcloud/status/2028405172657918277 · Twitter Post
• https://t.me/cveNotify/153738 · Telegram Post
• https://twitter.com/cracbot/status/2030237083231748561 · Twitter Post
• https://twitter.com/CVEnew/status/2028403575693476210 · Twitter Post
• https://twitter.com/cracbot/status/2029512328811847744 · Twitter Post
• https://t.me/CVEtracker/46096 · Telegram Post
• https://twitter.com/cracbot/status/2029874782452519394 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2028432687275348424 · Twitter Post