CVE-2026-5311 D-Link DNS-1550-04 file_center.cgi Webdav_Access_List access control
Attackers can bypass access controls in the WebDAV access list function of D-Link NAS devices via the file_center.cgi script.
- 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-2026-5311?
CVE-2026-5311 is a medium-severity missing authorization vulnerability in Dlink Dns-320 Firmware, published on 1 Apr 2026. An attacker can exploit it over the internet without logging in, 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 is the function Webdav_Access_List of the file /cgi-bin/file_center.cgi. Performing a manipulation of the argument cmd results in improper access controls. It is possible to initiate the attack remotely. The exploit has been released to the public and may be used for attacks.
Which versions are affected by CVE-2026-5311?
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-2026-5311?
No fix has been published for CVE-2026-5311 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-2026-5311 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5311 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-8c3r-vjwj-2gvx.