CVE-2026-4194 D-Link DNS-1550-04 system_mgr.cgi cgi_set_wto access control
Remote attackers can bypass access controls in the system_mgr.cgi script to perform unauthorized actions on D-Link NAS devices.
- 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-2026-4194?
CVE-2026-4194 is a medium-severity missing authorization vulnerability in Dlink Dns-320 Firmware, published on 15 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was detected 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. The impacted element is the function cgi_set_wto of the file /cgi-bin/system_mgr.cgi. Performing a manipulation results in improper access controls. Remote exploitation of the attack is possible. The exploit is now public and may be used.
Which versions are affected by CVE-2026-4194?
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-2026-4194?
No fix has been published for CVE-2026-4194 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-4194 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4194 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-j98c-59p5-f6gq.