Remote Denial of Service in Mediatek Modem Due to Uncaught Exception
CVE-2026-20401

5.9MEDIUM

Key Information:

Vendor

MediaTek
Status
Mt2735, Mt6833, Mt6853, Mt6855, Mt6873, Mt6875, Mt6877, Mt6880, Mt6883, Mt6885, Mt6889, Mt6890, Mt6891, Mt6893, Mt8675, Mt8771, Mt8791, Mt8791t, Mt8797
Vendor
CVE Published:
2 February 2026

What is CVE-2026-20401?

A vulnerability exists in Mediatek Modem that can lead to a system crash caused by an uncaught exception. This issue allows an attacker to execute a remote denial of service attack by connecting to a rogue base station that they control. Notably, this can occur without requiring user interaction, making it a significant threat to network security. The vulnerability is linked to Patch ID: MOLY01738310 and Issue ID: MSV-5933.

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Deploy the Patch

Affected Version(s)

MT2735, MT6833, MT6853, MT6855, MT6873, MT6875, MT6877, MT6880, MT6883, MT6885, MT6889, MT6890, MT6891, MT6893, MT8675, MT8771, MT8791, MT8791T, MT8797 Modem NR15

References

https://corp.mediatek.com/product-security-bulletin/Febru...

CVSS V3.1

Score:
5.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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