CVE-2020-26143 Security feature bypass in n/a

Medium 6.5 Published 11 May 2021 Updated 14 Apr 2026

Attackers can inject arbitrary data frames into protected Wi-Fi networks by exploiting a flaw in the ALFA Windows 10 driver's handling of fragmented plaintext frames.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2020-26143?

CVE-2020-26143 is a medium-severity vulnerability in n/a, published on 11 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An issue was discovered in the ALFA Windows 10 driver 1030.36.604 for AWUS036ACH. The WEP, WPA, WPA2, and WPA3 implementations accept fragmented plaintext frames in a protected Wi-Fi network. An adversary can abuse this to inject arbitrary data frames independent of the network configuration.

Weakness: CWE-20

Which versions are affected by CVE-2020-26143?

It affects 6 products.

Products include Alfa Awus036h Firmware, Arista C-65 Firmware, Arista C-75 Firmware, Arista O-90 Firmware, Arista W-68 Firmware, Siemens Scalance W700 Ieee 802.11n Firmware.

How do I fix CVE-2020-26143?

Apply the vendor's patch.

Is CVE-2020-26143 being exploited?

There is no known exploitation of CVE-2020-26143 in the wild and no public exploit code.

Sources

Also known as GHSA-c49c-jx24-458g, ROOT-OS-UBUNTU-2204-CVE-2020-26143, UBUNTU-CVE-2020-26143.