CVE-2026-4203
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. Impacted is the function cgi_portforwarding_add/cgi_portforwarding_del/cgi_portforwarding_modify/cgi_portforwarding_add_scan/cgi_dhcpd_lease/cgi_ddns/cgi_ip/cgi_dhcpd of the file /cgi-bin/network_mgr.cgi. The manipulation results in command injection. The attack may be launched remotely. The exploit is now public and may be used.
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| dlink dnr-202l_firmware | v ≤ 2026-02-05 | — |
| dlink dnr-326_firmware | v ≤ 2026-02-05 | — |
| dlink dns-1100-4_firmware | v ≤ 2026-02-05 | — |
| dlink dns-120_firmware | v ≤ 2026-02-05 | — |
| dlink dns-1200-05_firmware | v ≤ 2026-02-05 | — |
| dlink dns-1550-04_firmware | v ≤ 2026-02-05 | — |
| dlink dns-315l_firmware | v ≤ 2026-02-05 | — |
| dlink dns-320_firmware | v ≤ 2026-02-05 | — |
| dlink dns-320l_firmware | v ≤ 2026-02-05 | — |
| dlink dns-320lw_firmware | v ≤ 2026-02-05 | — |
| dlink dns-321_firmware | v ≤ 2026-02-05 | — |
| dlink dns-322l_firmware | v ≤ 2026-02-05 | — |
| dlink dns-323_firmware | v ≤ 2026-02-05 | — |
| dlink dns-325_firmware | v ≤ 2026-02-05 | — |
| dlink dns-326_firmware | v ≤ 2026-02-05 | — |
| dlink dns-327l_firmware | v ≤ 2026-02-05 | — |
| dlink dns-340l_firmware | v ≤ 2026-02-05 | — |
| dlink dns-343_firmware | v ≤ 2026-02-05 | — |
| dlink dns-345_firmware | v ≤ 2026-02-05 | — |
| dlink dns-726-4_firmware | v ≤ 2026-02-05 | — |
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