CVE-2026-4196 D-Link DNS-1550-04 remote_backup.cgi cgi_set_rsync_server command injection
Remote attackers can execute arbitrary commands on D-Link NAS devices via the remote_backup.cgi script, potentially compromising the device.
- 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-2026-4196?
CVE-2026-4196 is a medium-severity command injection vulnerability in Dlink Dns-320 Firmware, published on 15 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability has been found 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. This impacts the function cgi_recovery/cgi_backup_now/cgi_set_schedule/cgi_set_rsync_server of the file /cgi-bin/remote_backup.cgi. The manipulation leads to command injection. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2026-4196?
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-2026-4196?
No fix has been published for CVE-2026-4196 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-2026-4196 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4196 exists.
Other vulnerabilities in Dlink Dns-320 Firmware
- CVE-2024-3272 D-Link Multiple NAS Devices Use of Hard-Coded Credentials
- CVE-2024-3273 D-Link Multiple NAS Devices Command Injection
- CVE-2026-5211 D-Link DNS-1550-04 app_mgr.cgi UPnP_AV_Server_Path_Del stack-based overflow
- CVE-2026-5212 D-Link DNS-1550-04 webdav_mgr.cgi Webdav_Upload_File stack-based overflow
- CVE-2026-5213 D-Link DNS-1550-04 account_mgr.cgi cgi_adduser_to_session stack-based overflow
Sources
Also known as GHSA-fvg7-m8g3-2hjj.