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CVE-2026-4194— D-Link DNS-1550-04 system_mgr.cgi cgi_set_wto access control

Quick assessment

Affected
D-Link DNS-120
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

D-Link DNS-320等都是中国友讯（D-Link）公司的产品。D-Link DNS-320是一款NAS（网络附属存储）设备。D-Link DNS-325是一款NAS（网络附属存储）设备。D-Link DNS-120是一个网络存储适配器。 D-Link多款产品存在访问控制错误漏洞，该漏洞源于访问控制不当。以下产品及版本受到影响：DNS-120、DNR-202L、DNS-315L、DNS-320、DNS-320L、DNS-320LW、DNS-321、DNR-322L、DNS-323、DNS-325、D

CVSS 7.3 · High EPSS 3.00% · P87

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-4194

Vulnerability Information
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Vulnerability Title
D-Link DNS-1550-04 system_mgr.cgi cgi_set_wto access control
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
D-Link多款产品 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
D-Link DNS-320等都是中国友讯（D-Link）公司的产品。D-Link DNS-320是一款NAS（网络附属存储）设备。D-Link DNS-325是一款NAS（网络附属存储）设备。D-Link DNS-120是一个网络存储适配器。 D-Link多款产品存在访问控制错误漏洞，该漏洞源于访问控制不当。以下产品及版本受到影响：DNS-120、DNR-202L、DNS-315L、DNS-320、DNS-320L、DNS-320LW、DNS-321、DNR-322L、DNS-323、DNS-325、D
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

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

II. Public POCs for CVE-2026-4194

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7227 chars
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III. Intelligence Information for CVE-2026-4194

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Vendor Pages for CVE-2026-4194 (1)

Other References for CVE-2026-4194 (1)

Same Patch Batch · D-Link · 2026-03-15 · 11 CVEs total

CVE-2026-4184 9.8 CRITICAL D-Link DIR-816 goahead form2Wl5BasicSetup.cgi stack-based overflow
CVE-2026-4183 9.8 CRITICAL D-Link DIR-816 goahead form2WlanBasicSetup.cgi stack-based overflow
CVE-2026-4182 9.8 CRITICAL D-Link DIR-816 goahead form2Wl5RepeaterStep2.cgi stack-based overflow
CVE-2026-4181 9.8 CRITICAL D-Link DIR-816 goahead form2RepeaterStep2.cgi stack-based overflow
CVE-2026-4188 8.8 HIGH D-Link DIR-619L boa formSchedule stack-based overflow
CVE-2026-4193 7.3 HIGH D-Link DIR-823G goahead UpdateClientInfo access control
CVE-2026-4180 7.3 HIGH D-Link DIR-816 goahead redirect.asp access control
CVE-2026-4197 6.3 MEDIUM D-Link DNS-1550-04 download_mgr.cgi RSS_Item_List command injection
CVE-2026-4196 6.3 MEDIUM D-Link DNS-1550-04 remote_backup.cgi cgi_set_rsync_server command injection
CVE-2026-4195 6.3 MEDIUM D-Link DNS-1550-04 wizard_mgr.cgi command injection

IV. Related Vulnerabilities

Same product: DNS-120
Same vendor: D-Link
Same weakness: CWE-284

V. Comments for CVE-2026-4194

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