Remote DoS via Improper Input Validation in MediaTek Modem
CVE-2026-20402 Published on February 2, 2026

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: MOLY00693083; Issue ID: MSV-5928.

NVD

Vulnerability Analysis

Attack Vector:
ADJACENT_NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH

Weakness Type

What is a Memory Corruption Vulnerability?

The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.

CVE-2026-20402 has been classified to as a Memory Corruption vulnerability or weakness.


Products Associated with CVE-2026-20402

stack.watch emails you whenever new vulnerabilities are published in MediaTek Mt6855 or Google Android. Just hit a watch button to start following.

MediaTek Mt6855
 
Google Android
 

Affected Versions

MediaTek, Inc. MediaTek chipset:

Exploit Probability

EPSS
0.07%
Percentile
21.78%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.