CVE-2026-4205

moderate-risk

Published 2026-03-16

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.

Do I need to act?

0.17% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 6.3/10 Medium

NETWORK / LOW complexity

Affected Products (20)

Dnr-202L Firmware

Dnr-326 Firmware

Dns-1100-4 Firmware

Dns-120 Firmware

Dns-1200-05 Firmware

Dns-1550-04 Firmware

Dns-315L Firmware

Dns-320 Firmware

Dns-320L Firmware

Dns-320Lw Firmware

Dns-321 Firmware

Dns-322L Firmware

Dns-323 Firmware

Dns-325 Firmware

Dns-326 Firmware

Dns-327L Firmware

Dns-340L Firmware

Dns-343 Firmware

Dns-345 Firmware

Dns-726-4 Firmware

Affected Vendors

Dlink

References (8)

Exploit https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_131/131.md

Exploit https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_132/132.md

Permissions Required https://vuldb.com/?ctiid.351117

Third Party Advisory https://vuldb.com/?id.351117

Third Party Advisory https://vuldb.com/?submit.770410

Third Party Advisory https://vuldb.com/?submit.770411

Third Party Advisory https://vuldb.com/?submit.770412

Product https://www.dlink.com/

/ 100

moderate-risk

Severity 23/34 · High

Exploitability 1/34 · Minimal

Exposure 20/34 · Moderate