CVE-2026-4205
Description
A vulnerability 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 impacted element is the function cgi_refresh_db/FTP_Server_BlockIP_Add/FTP_Server_BlockIP_Del of the file /cgi-bin/app_mgr.cgi. Such manipulation leads to command injection. The attack can be executed remotely. The exploit has been disclosed to the 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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