CVE-2026-4204
CRITICAL WAF: High
CVSS 9.8
Published: 2026-03-16
CWE-77 CWE-77
A flaw 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. The affected element is the function cgi_myfavorite_add/cgi_myfavorite_set/cgi_myfavorite_del/cgi_myfavorite_set_sort_info/cgi_myfavorite_remove_apkg/cgi_myfavorite_compare_apkg/cgi_mycloud_auto_downlaod of the file /cgi-bin/gui_mgr.cgi. This manipulation of the argument f_user causes command injection. Remote exploitation of the attack is possible. The exploit has been published and may be used.
WAF Coverage Analysis
Command Injection
High WAF Coverage
OWASP: A03:2021 Injection
932xxx - Remote Code Execution
Command Injection
High WAF Coverage
OWASP: A03:2021 Injection
932xxx - Remote Code Execution
Affected Software
| Vendor | Product | Version |
|---|---|---|
| dlink | dnr-202l_firmware | up to 2026-02-05 |
| dlink | dnr-326_firmware | up to 2026-02-05 |
| dlink | dns-1100-4_firmware | up to 2026-02-05 |
| dlink | dns-120_firmware | up to 2026-02-05 |
| dlink | dns-1200-05_firmware | up to 2026-02-05 |
| dlink | dns-1550-04_firmware | up to 2026-02-05 |
| dlink | dns-315l_firmware | up to 2026-02-05 |
| dlink | dns-320_firmware | up to 2026-02-05 |
| dlink | dns-320l_firmware | up to 2026-02-05 |
| dlink | dns-320lw_firmware | up to 2026-02-05 |
References
- github.com (Exploit, Third Party Advisory)
- vuldb.com (Permissions Required, VDB Entry)
- vuldb.com (Third Party Advisory, VDB Entry)
- vuldb.com (Third Party Advisory, VDB Entry)
- www.dlink.com (Product)