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CVE-2026-4182— D-Link DIR-816 goahead form2Wl5RepeaterStep2.cgi stack-based overflow

Quick assessment

Affected
D-Link DIR-816
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 DIR-816是中国友讯（D-Link）公司的一款无线路由器。 D-Link DIR-816 1.10CNB05版本存在安全漏洞，该漏洞源于对文件/goform/form2Wl5RepeaterStep2.cgi中参数key1/key2/key3/key4/pskValue的错误操作，可能导致栈缓冲区溢出攻击。

CVSS 9.8 · Critical EPSS 1.88% · P79

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-4182

Vulnerability Information
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Vulnerability Title
D-Link DIR-816 goahead form2Wl5RepeaterStep2.cgi stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A weakness has been identified in D-Link DIR-816 1.10CNB05. This impacts an unknown function of the file /goform/form2Wl5RepeaterStep2.cgi of the component goahead. This manipulation of the argument key1/key2/key3/key4/pskValue causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks. This vulnerability only affects products that are no longer supported by the maintainer.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
D-Link DIR-816 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
D-Link DIR-816是中国友讯（D-Link）公司的一款无线路由器。 D-Link DIR-816 1.10CNB05版本存在安全漏洞，该漏洞源于对文件/goform/form2Wl5RepeaterStep2.cgi中参数key1/key2/key3/key4/pskValue的错误操作，可能导致栈缓冲区溢出攻击。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
D-Link DIR-816 1.10CNB05 -

II. Public POCs for CVE-2026-4182

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Qwen3.6-35B-A3B · 7676 chars
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III. Intelligence Information for CVE-2026-4182

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Vendor Advisories for CVE-2026-4182 (2)

Security Blog Posts for CVE-2026-4182 (1)

Vendor Pages for CVE-2026-4182 (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-2026-4181 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-2026-4194 7.3 HIGH D-Link DNS-1550-04 system_mgr.cgi cgi_set_wto access control
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: DIR-816
Same vendor: D-Link
Same weakness: CWE-121

V. Comments for CVE-2026-4182

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