Critical severity · published Mar 16, 2026
CVE-2026-4206
D-Link DNS-1550-04 dsk_mgr.cgi ScanDisk_run_e2fsck command injection
9.8
CVSS
5.3%
EPSS
No
On KEV
Description
A vulnerability was 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. This affects the function FMT_rebuild_diskmgr/FMT_create_diskmgr/ScanDisk_run_e2fsck of the file /cgi-bin/dsk_mgr.cgi. Performing a manipulation results in command injection. The attack is possible to be carried out remotely. The exploit has been made public and could 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)5.3% · higher than 93% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DN
DNR-202L · D-Link
20260205 · source: vendor
DN
DNR-322L · D-Link
20260205 · source: vendor
DN
DNR-326 · D-Link
20260205 · source: vendor
DN
DNS-1100-4 · D-Link
20260205 · source: vendor
DN
DNS-120 · D-Link
20260205 · source: vendor
DN
DNS-1200-05 · D-Link
20260205 · source: vendor
DN
DNS-1550-04 · D-Link
20260205 · source: vendor
DN
DNS-315L · D-Link
20260205 · source: vendor
DN
DNS-320 · D-Link
20260205 · source: vendor
DN
DNS-320L · D-Link
20260205 · source: vendor
DN
DNS-320LW · D-Link
20260205 · source: vendor
DN
DNS-321 · D-Link
20260205 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4206
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4206
Exploit
https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_138/138.md
Exploit
https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_139/139.md
Permissions Required
https://vuldb.com/?ctiid.351118
Third Party Advisory
https://vuldb.com/?id.351118
Third Party Advisory
https://vuldb.com/?submit.770417
Third Party Advisory
https://vuldb.com/?submit.770418
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