CVE-2026-4194

D-Link DNS-1550-04 system_mgr.cgi cgi_set_wto access control

State: Published
Severity: 6.9 Medium
Published: Mar 15, 2026
Updated: Mar 16, 2026
Reserved: Mar 15, 2026

Description

A vulnerability was detected 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_set_wto of the file /cgi-bin/system_mgr.cgi. Performing a manipulation results in improper access controls. Remote exploitation of the attack is possible. The exploit is now public and may be used.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P	VulDB
3.1	7.3 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:W/RC:R	VulDB
3.0	7.3 High	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:W/RC:R	VulDB
2.0	7.5 High	AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:W/RC:UR	VulDB

Weaknesses

CWE-284 Improper Access Controls
CWE-266 Incorrect Privilege Assignment

Affected Products

Product	Versions
DNS-120D-Link	20260205Affected
DNR-202LD-Link	20260205Affected
DNS-315LD-Link	20260205Affected
DNS-320D-Link	20260205Affected
DNS-320LD-Link	20260205Affected
DNS-320LWD-Link	20260205Affected
DNS-321D-Link	20260205Affected
DNR-322LD-Link	20260205Affected
DNS-323D-Link	20260205Affected
DNS-325D-Link	20260205Affected
DNS-326D-Link	20260205Affected
DNS-327LD-Link	20260205Affected
DNR-326D-Link	20260205Affected
DNS-340LD-Link	20260205Affected
DNS-343D-Link	20260205Affected
DNS-345D-Link	20260205Affected
DNS-726-4D-Link	20260205Affected
DNS-1100-4D-Link	20260205Affected
DNS-1200-05D-Link	20260205Affected
DNS-1550-04D-Link	20260205Affected

References

VDB-351106 | D-Link DNS-1550-04 system_mgr.cgi cgi_set_wto access controlvdb-entrytechnical-description
VDB-351106 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
Submit #769853 | D-Link DNS-120/202L/315L/320/320L/320LW/321/322L/323/325/326/327L/340L/343/345/726-4/1100-4/1200-05/1550-04 up to 20260205 Authentication Bypass Issuesthird-party-advisory
https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_96/96.mdexploit
https://www.dlink.com/product

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