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Vulnerability · Published Mar 16, 2026 · Assigned by VulDB

CVE-2026-4204D-Link DNS-1550-04 gui_mgr.cgi cgi_mycloud_auto_downlaod command injection

Medium 6.3

In plain English

A medium-severity command injection in DNR-202L from D-Link. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 4.0% (higher than 90% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium
Exploit odds (30 days)4.0%top 9.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

VendorProductVersions
D-Link DNS-120 20260205
D-Link DNR-202L 20260205
D-Link DNS-315L 20260205
D-Link DNS-320 20260205
D-Link DNS-320L 20260205
D-Link DNS-320LW 20260205
D-Link DNS-321 20260205
D-Link DNR-322L 20260205
D-Link DNS-323 20260205
D-Link DNS-325 20260205
D-Link DNS-326 20260205
D-Link DNS-327L 20260205
D-Link DNR-326 20260205
D-Link DNS-340L 20260205
D-Link DNS-343 20260205
D-Link DNS-345 20260205
D-Link DNS-726-4 20260205
D-Link DNS-1100-4 20260205
D-Link DNS-1200-05 20260205
D-Link DNS-1550-04 20260205

Weakness: CWE-77, CWE-74 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References