CVE-2021-33114 Denial of service in Intel(R) PROSet/Wireless WiFi in multiple operating systems and Killer(TM) WiFi in Windows 10 and 11

Medium 5.7 Published 9 Feb 2022 Updated 5 May 2025

An authenticated user with adjacent access can cause a denial of service in Intel and Killer WiFi drivers due to improper input validation.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-33114?

CVE-2021-33114 is a medium-severity denial of service vulnerability in Intel(R) PROSet/Wireless WiFi in multiple operating systems and Killer(TM) WiFi in Windows 10 and 11, published on 9 Feb 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Improper input validation for some Intel(R) PROSet/Wireless WiFi in multiple operating systems and Killer(TM) WiFi in Windows 10 and 11 may allow an authenticated user to potentially enable denial of service via adjacent access.

Weakness: CWE-20

Which versions are affected by CVE-2021-33114?

It affects 15 products.

Products include Intel Ac 1550 Firmware, Intel Ac 3165 Firmware, Intel Ac 3168 Firmware, Intel Ac 7265 Firmware, Intel Ac 8260 Firmware, Intel Ac 8265 Firmware and 9 more.

How do I fix CVE-2021-33114?

No fix has been published for CVE-2021-33114 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-33114 being exploited?

There is no known exploitation of CVE-2021-33114 in the wild and no public exploit code.

Sources

Also known as GHSA-27qg-f2r7-8953, UBUNTU-CVE-2021-33114.