Out of Bounds Write Vulnerability in Thread by MediaTek
CVE-2026-20418

9.8CRITICAL

Key Information:

Vendor

MediaTek
Status
Mt7931, Mt7933
Vendor
CVE Published:
2 February 2026

What is CVE-2026-20418?

In MediaTek's Thread protocol, an out of bounds write vulnerability exists due to insufficient bounds checking. This security flaw allows an attacker to potentially escalate privileges remotely without requiring any user interaction. The issue can compromise system integrity, making it essential for users to apply the available patches to mitigate risks. Affected users should upgrade their systems to the latest versions to ensure protection against this vulnerability.

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Affected Version(s)

MT7931, MT7933 Matter version 1.4 and before

References

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

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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