D-Link DNS-1550-04 up to 20260205 /cgi-bin/dsk_mgr.cgi access control

Summaryinfo

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. It has been rated as critical. Affected by this issue is the function FMT_restart/Status_HDInfo/SMART_List/ScanDisk_info/ScanDisk/volume_status/Get_Volume_Mapping/FMT_check_disk_remount_state/FMT_rebuildinfo/FMT_result_list/FMT_result_list_phy/FMT_get_dminfo/FMT_manually_rebuild_info/Get_current_raidtype of the file /cgi-bin/dsk_mgr.cgi. The manipulation leads to access control. This vulnerability is documented as CVE-2026-5312. The attack can be initiated remotely. Additionally, an exploit exists.

Detailsinfo

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 and classified as critical. This issue affects the function FMT_restart/Status_HDInfo/SMART_List/ScanDisk_info/ScanDisk/volume_status/Get_Volume_Mapping/FMT_check_disk_remount_state/FMT_rebuildinfo/FMT_result_list/FMT_result_list_phy/FMT_get_dminfo/FMT_manually_rebuild_info/Get_current_raidtype of the file /cgi-bin/dsk_mgr.cgi. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is availability.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-5312. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/02/2026). MITRE ATT&CK project uses the attack technique T1068 for this issue.

The exploit is available at github.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-18069). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• D-Link

Name

• DNR-202L
• DNR-322L
• DNR-326
• DNS-120
• DNS-315L
• DNS-320
• DNS-320L
• DNS-320LW
• DNS-321
• DNS-323
• DNS-325
• DNS-326
• DNS-327L
• DNS-340L
• DNS-343
• DNS-345
• DNS-726-4
• DNS-1100-4
• DNS-1200-05
• DNS-1550-04

Version

• 20260205

License

• commercial

Website

• Vendor: https://www.dlink.com/

CPE 2.3info

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CPE 2.2info

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Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Submitinfo

Accepted

• Submit #780442: D-Link DNS-120/202L/315L/320/320L/320LW/321/322L/323/325/326/327L/326/340L/343/345/726-4/1100-4/1200-05/1550-04 up to 20260205 Improper Access Controls (by Ziyue Xie)

Duplicate

• Submit #XXXXXX: X-xxxx Xxx-xxx/xxxx/xxxx/xxx/xxxx/xxxxx/xxx/xxxx/xxx/xxx/xxx/xxxx/xxx/xxxx/xxx/xxx/xxx-x/xxxx-x/xxxx-xx/xxxx-xx Xx Xx Xxxxxxxx Xxxxxxxx Xxxxxx Xxxxxxxx (by Ziyue Xie)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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