EUVD-2026-17663
GHSA-rgch-x4h6-m876
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4Description
A vulnerability was determined 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_adduser_to_session of the file /cgi-bin/account_mgr.cgi. This manipulation of the argument read_list causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized.
Analysis
Stack-based buffer overflow in D-Link NAS devices allows authenticated remote attackers to achieve complete system compromise with high-confidence exploitation. Affects 20+ D-Link DNS and DNR series network storage products through firmware versions released until February 5, 2026. …
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Remediation
Within 24 hours: Inventory all D-Link DNS and DNR series NAS devices in your environment and document firmware versions; restrict network access to NAS management interfaces using firewall rules limiting access to administrative personnel only. Within 7 days: Contact D-Link support to confirm patch availability timeline and evaluate temporary isolation of affected devices from production networks if mission-critical alternatives exist. …
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