Denial of Service Vulnerability in MediaTek WLAN Firmware
CVE-2026-20419

6.5MEDIUM

Key Information:

Vendor

MediaTek
Status
Mt6890, Mt6989tb, Mt7902, Mt7915, Mt7916, Mt7920, Mt7921, Mt7922, Mt7925, Mt7927, Mt7981, Mt7986, Mt8196, Mt8668, Mt8676, Mt8678, Mt8775, Mt8791t, Mt8792, Mt8793, Mt8796, Mt8873, Mt8883, Mt8893, Mt8910
Vendor
CVE Published:
2 February 2026

What is CVE-2026-20419?

A vulnerability exists in MediaTek WLAN AP/STA firmware that could cause the system to become unresponsive due to an unhandled exception during operation. This issue may allow an attacker located in close proximity to initiate a denial of service without needing any privileges or user interaction. Affected versions require immediate attention and patching to mitigate potential remote exploitation.

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Deploy the Patch

Affected Version(s)

MT6890, MT6989TB, MT7902, MT7915, MT7916, MT7920, MT7921, MT7922, MT7925, MT7927, MT7981, MT7986, MT8196, MT8668, MT8676, MT8678, MT8775, MT8791T, MT8792, MT8793, MT8796, MT8873, MT8883, MT8893, MT8910 CE/NB SDK release 3.6 and before / SDK release 7.6.7.2 and before / OpenWrt 19.07, 21.02 (MT6890)

References

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

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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