CVE-2018-15840 Denial of service in n/a

High 7.5 Published 29 Mar 2019 Updated 5 Aug 2024

Remote attackers can cause a networking outage on TP-Link TL-WR840N routers by sending fragmented packets.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2018-15840?

CVE-2018-15840 is a high-severity denial of service vulnerability in n/a, published on 29 Mar 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

TP-Link TL-WR840N devices allow remote attackers to cause a denial of service (networking outage) via fragmented packets, as demonstrated by an "nmap -f" command.

Weakness: CWE-119

Which versions are affected by CVE-2018-15840?

It affects 1 product.

Products include Tp-Link Tl-Wr840n Firmware.

How do I fix CVE-2018-15840?

No fix has been published for CVE-2018-15840 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-2018-15840 being exploited?

There is no known exploitation of CVE-2018-15840 in the wild and no public exploit code.

Sources

Also known as GHSA-fcm9-4278-c4rv.