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CVE-2025-7836— D-Link DIR-816L Environment Variable cgibin lxmldbc_system command injection

Quick assessment

Affected
D-Link DIR-816L
Exploitation
High exploitation probability; assess promptly
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-816L是中国友讯（D-Link）公司的一款无线路由器。 D-Link DIR-816L 2.06B01及之前版本存在注入漏洞，该漏洞源于环境变量处理组件中lxmldbc_system函数存在命令注入。

CVSS 6.3 · Medium EPSS 5.75% · P93

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-7836

Vulnerability Information
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Vulnerability Title
D-Link DIR-816L Environment Variable cgibin lxmldbc_system command injection
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been found in D-Link DIR-816L up to 2.06B01 and classified as critical. Affected by this vulnerability is the function lxmldbc_system of the file /htdocs/cgibin of the component Environment Variable Handler. The manipulation leads to command injection. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. 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:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
D-Link DIR-816L 注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
D-Link DIR-816L是中国友讯（D-Link）公司的一款无线路由器。 D-Link DIR-816L 2.06B01及之前版本存在注入漏洞，该漏洞源于环境变量处理组件中lxmldbc_system函数存在命令注入。
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-816L 2.06B01 -

II. Public POCs for CVE-2025-7836

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III. Intelligence Information for CVE-2025-7836

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Proof of Concept for CVE-2025-7836 (1)

Vendor Pages for CVE-2025-7836 (1)

IV. Related Vulnerabilities

Same product: DIR-816L
Same vendor: D-Link
Same weakness: CWE-77

V. Comments for CVE-2025-7836

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