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CVE-2026-7247— D-Link DI-8100 File Extension file_exten.asp file_exten_asp buffer overflow

Quick assessment

Affected
D-Link DI-8100
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 DI-8100是中国友讯（D-Link）公司的一款专为中小型网络环境设计的无线宽带路由器。 D-Link DI-8100 16.07.26A1版本存在缓冲区错误漏洞，该漏洞源于File Extension Handler组件中file_exten.asp文件的file_exten_asp函数对参数Name的操作，可能导致缓冲区溢出。

CVSS 7.2 · High EPSS 1.24% · P68

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-7247

Vulnerability Information
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Vulnerability Title
D-Link DI-8100 File Extension file_exten.asp file_exten_asp buffer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been found in D-Link DI-8100 16.07.26A1. Affected by this issue is the function file_exten_asp of the file file_exten.asp of the component File Extension Handler. The manipulation of the argument Name leads to buffer overflow. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
D-Link DI-8100 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
D-Link DI-8100是中国友讯（D-Link）公司的一款专为中小型网络环境设计的无线宽带路由器。 D-Link DI-8100 16.07.26A1版本存在缓冲区错误漏洞，该漏洞源于File Extension Handler组件中file_exten.asp文件的file_exten_asp函数对参数Name的操作，可能导致缓冲区溢出。
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 DI-8100 16.07.26A1 -

II. Public POCs for CVE-2026-7247

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III. Intelligence Information for CVE-2026-7247

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Vendor Advisories for CVE-2026-7247 (1)

Proof of Concept for CVE-2026-7247 (1)

Vendor Pages for CVE-2026-7247 (1)

Same Patch Batch · D-Link · 2026-04-28 · 4 CVEs total

CVE-2026-7248 9.8 CRITICAL D-Link DI-8100 CGI Endpoint tgfile.htm tgfile_htm buffer overflow
CVE-2026-7288 8.8 HIGH D-Link DIR-825M formVpnConfigSetup sub_4151FC buffer overflow
CVE-2026-7289 8.8 HIGH D-Link DIR-825M formWanConfigSetup sub_414BA8 buffer overflow

IV. Related Vulnerabilities

Same product: DI-8100
Same vendor: D-Link
Same weakness: CWE-120

V. Comments for CVE-2026-7247

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