System Crash Vulnerability in Mediatek Modem
CVE-2026-20420

7.5HIGH

Key Information:

Vendor

MediaTek
Status
Mt2735, Mt2737, Mt6813, Mt6815, Mt6833, Mt6835, Mt6853, Mt6855, Mt6858, Mt6873, Mt6875, Mt6877, Mt6878, Mt6879, Mt6880, Mt6883, Mt6885, Mt6886, Mt6889, Mt6890, Mt6891, Mt6893, Mt6895, Mt6896, Mt6897, Mt6899, Mt6980, Mt6983, Mt6985, Mt6986, Mt6989, Mt6990, Mt6991, Mt6993, Mt8676, Mt8791
Vendor
CVE Published:
2 February 2026

What is CVE-2026-20420?

A vulnerability exists in Mediatek's modem that can lead to system crashes due to improper error handling. This flaw allows an attacker controlling a rogue base station to cause a denial of service for connected user equipment, without needing user interaction or elevated privileges. The issue has been documented under Patch ID: MOLY01738313 and Issue ID: MSV-5935, highlighting a significant risk for affected users.

Human OS v1.0:
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Deploy the Patch

Affected Version(s)

MT2735, MT2737, MT6813, MT6815, MT6833, MT6835, MT6853, MT6855, MT6858, MT6873, MT6875, MT6877, MT6878, MT6879, MT6880, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6896, MT6897, MT6899, MT6980, MT6983, MT6985, MT6986, MT6989, MT6990, MT6991, MT6993, MT8676, MT8791 Modem NR15, NR16, NR17, NR17R

References

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

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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