CVE-2026-2168 D-Link DWR-M921 formLtefotaUpgradeQuectel sub_419920 command injection

Medium 5.3 Published 8 Feb 2026 Updated 23 Feb 2026

Remote attackers can execute arbitrary commands on D-Link DWR-M921 routers via the LTE firmware upgrade interface.

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

What is CVE-2026-2168?

CVE-2026-2168 is a medium-severity command injection vulnerability in D-Link DWR-M921, published on 8 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A flaw has been found in D-Link DWR-M921 1.1.50. This affects the function sub_419920 of the file /boafrm/formLtefotaUpgradeQuectel. This manipulation of the argument fota_url causes command injection. It is possible to initiate the attack remotely. The exploit has been published and may be used.

Weakness: CWE-77, CWE-74

Which versions are affected by CVE-2026-2168?

It affects 1 product.

Products include Dlink Dwr-M921 Firmware.

How do I fix CVE-2026-2168?

No fix has been published for CVE-2026-2168 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2026-2168 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2168 exists.

Sources

Also known as GHSA-37gh-h6xp-rvc2.