CVE-2026-4210 D-Link DNS-1550-04 time_machine.cgi cgi_tm_set_share command injection

Medium 5.3 Published 16 Mar 2026 Updated 16 Mar 2026

Remote attackers can execute arbitrary commands on D-Link NAS devices via the time_machine.cgi script, requiring immediate attention from device administrators.

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-2026-4210?

CVE-2026-4210 is a medium-severity command injection vulnerability in Dlink Dns-320 Firmware, published on 16 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A security flaw has been discovered in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323, DNS-325, DNS-326, DNS-327L, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05 and DNS-1550-04 up to 20260205. Affected by this vulnerability is the function cgi_tm_set_share of the file /cgi-bin/time_machine.cgi. The manipulation of the argument Name results in command injection. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks.

Weakness: CWE-77, CWE-74

Which versions are affected by CVE-2026-4210?

It affects 20 products.

Products include Dlink Dnr-202l Firmware, Dlink Dnr-326 Firmware, Dlink Dns-1100-4 Firmware, Dlink Dns-1200-05 Firmware, Dlink Dns-120 Firmware, Dlink Dns-1550-04 Firmware and 14 more.

How do I fix CVE-2026-4210?

No fix has been published for CVE-2026-4210 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-2026-4210 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4210 exists.

All Dlink Dns-320 Firmware vulnerabilities

Sources

Also known as GHSA-5mgx-mffw-264m.