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CVE-2026-4499— D-Link DIR-820LW SSDP ssdpcgi_main os command injection

Quick assessment

Affected
D-Link DIR-820LW
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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-820LW是中国友讯（D-Link）公司的一款双频无线路由器。 D-Link DIR-820LW 2.03版本存在操作系统命令注入漏洞，该漏洞源于SSDP组件中函数ssdpcgi_main存在os命令注入，可能导致远程执行任意代码。

CVSS 7.3 · High EPSS 3.52% · P88

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-4499

Vulnerability Information
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Vulnerability Title
D-Link DIR-820LW SSDP ssdpcgi_main os command injection
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was determined in D-Link DIR-820LW 2.03. Affected is the function ssdpcgi_main of the component SSDP. Executing a manipulation can lead to os command injection. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized.
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
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
D-Link DIR-820LW 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
D-Link DIR-820LW是中国友讯（D-Link）公司的一款双频无线路由器。 D-Link DIR-820LW 2.03版本存在操作系统命令注入漏洞，该漏洞源于SSDP组件中函数ssdpcgi_main存在os命令注入，可能导致远程执行任意代码。
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 DIR-820LW 2.03 -

II. Public POCs for CVE-2026-4499

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III. Intelligence Information for CVE-2026-4499

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Vendor Advisories for CVE-2026-4499 (2)

Proof of Concept for CVE-2026-4499 (1)

Vendor Pages for CVE-2026-4499 (1)

Other References for CVE-2026-4499 (1)

Same Patch Batch · D-Link · 2026-03-20 · 3 CVEs total

CVE-2026-4486 8.8 HIGH D-Link DIR-513 Web Service formEasySetPassword stack-based overflow
CVE-2026-4465 6.3 MEDIUM D-Link DIR-513 formSysCmd os command injection

IV. Related Vulnerabilities

Same vendor: D-Link
Same weakness: CWE-78

V. Comments for CVE-2026-4499

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