CVE-2022-4296 TP-Link TL-WR740N ARP resource consumption

Medium 6.5 Published 6 Dec 2022 Updated 15 Apr 2025

An attacker on the local network can cause a denial of service in TP-Link TL-WR740N routers by exploiting the ARP handler.

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

What is CVE-2022-4296?

CVE-2022-4296 is a medium-severity denial of service vulnerability in TP-Link TL-WR740N, published on 6 Dec 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability classified as problematic has been found in TP-Link TL-WR740N. Affected is an unknown function of the component ARP Handler. The manipulation leads to resource consumption. The attack needs to be done within the local network. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-214812.

Weakness: CWE-404

Which versions are affected by CVE-2022-4296?

It affects 1 product.

Products include Tp-Link Tl-Wr740n Firmware.

How do I fix CVE-2022-4296?

No fix has been published for CVE-2022-4296 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-2022-4296 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-4296 exists.

Sources

Also known as GHSA-ppxj-vprv-272m.