Home/CVE/A vulnerability has been found in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, D
CVE

CVE-2026-4205

A vulnerability has been found in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, D

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.

MEDIUM · CVSS 6.3 EPSS 0.00187
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
▤

Affected Products & Versions

20
dlink dnr-202l firmware<= 2026-02-05
dlink dnr-326 firmware<= 2026-02-05
dlink dns-1100-4 firmware<= 2026-02-05
dlink dns-120 firmware<= 2026-02-05
dlink dns-1200-05 firmware<= 2026-02-05
dlink dns-1550-04 firmware<= 2026-02-05
dlink dns-315l firmware<= 2026-02-05
dlink dns-320 firmware<= 2026-02-05
⚠

Public Exploits & PoCs

2
pocgithub.com · 131.mdgithub.com
pocgithub.com · 132.mdgithub.com
▣

Scoring & Timeline

6.3
MEDIUM · CVSS v3.1 · cna@vuldb.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD16 Mar 2026 · 02:20 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://vuldb.com/?ctiid.351117Permissions RequiredVDB Entry
https://vuldb.com/?id.351117Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.770410Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.770411Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.770412Third Party AdvisoryVDB Entry
https://www.dlink.com/Product
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