Heap Buffer Overflow in Mediatek WLAN Products
CVE-2026-20408

8.8HIGH

Key Information:

Vendor

MediaTek
Status
Mt6890, Mt7615, Mt7915, Mt7916, Mt7981, Mt7986
Vendor
CVE Published:
2 February 2026

What is CVE-2026-20408?

A heap buffer overflow vulnerability exists in Mediatek's WLAN products, which can potentially allow an attacker to escalate privileges without requiring any user interaction. This flaw enables remote access to affected systems, posing significant security risks if left unchecked. Affected products may require immediate updates to mitigate exploitation risks.

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Affected Version(s)

MT6890, MT7615, MT7915, MT7916, MT7981, MT7986 SDK release 7.6.7.2 and before / openWRT 19.07, 21.02, 23.05

References

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

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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