Critical severity · published Mar 16, 2026
CVE-2026-4204
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,…
9.8
CVSS
3.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.9% · higher than 90% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DF
Dnr-202l Firmware · Dlink
through 2026-02-05 · source: NVD
DF
Dnr-326 Firmware · Dlink
through 2026-02-05 · source: NVD
DF
Dns-1100-4 Firmware · Dlink
through 2026-02-05 · source: NVD
DF
Dns-120 Firmware · Dlink
through 2026-02-05 · source: NVD
DF
Dns-1200-05 Firmware · Dlink
through 2026-02-05 · source: NVD
DF
Dns-1550-04 Firmware · Dlink
through 2026-02-05 · source: NVD
DF
Dns-315l Firmware · Dlink
through 2026-02-05 · source: NVD
DF
Dns-320 Firmware · Dlink
through 2026-02-05 · source: NVD
DF
Dns-320l Firmware · Dlink
through 2026-02-05 · source: NVD
DF
Dns-320lw Firmware · Dlink
through 2026-02-05 · source: NVD
DF
Dns-321 Firmware · Dlink
through 2026-02-05 · source: NVD
DF
Dns-322l Firmware · Dlink
through 2026-02-05 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4204
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4204
Exploit
https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_130/130.md
Permissions Required
https://vuldb.com/?ctiid.351116
Third Party Advisory
https://vuldb.com/?id.351116
Third Party Advisory
https://vuldb.com/?submit.770409
Product
https://www.dlink.com/
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