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CVE-2025-11339— D-Link DI-7100G C1 jhttpd hi_block.asp sub_4BD4F8 buffer overflow

Quick assessment

Affected
D-Link DI-7100G C1
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-7100G是中国友讯（D-Link）公司的一款无线路由器。 D-Link DI-7100G C1 20250928及之前版本存在安全漏洞，该漏洞源于对文件/webchat/hi_block.asp中参数popupId的错误操作，可能导致缓冲区溢出。

CVSS 8.8 · High EPSS 0.88% · P56
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I. Basic Information for CVE-2025-11339

Vulnerability Information
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Vulnerability Title
D-Link DI-7100G C1 jhttpd hi_block.asp sub_4BD4F8 buffer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been found in D-Link DI-7100G C1 up to 20250928. This issue affects the function sub_4BD4F8 of the file /webchat/hi_block.asp of the component jhttpd. The manipulation of the argument popupId leads to buffer overflow. The attack can be initiated remotely. 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:L/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-7100G 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
D-Link DI-7100G是中国友讯（D-Link）公司的一款无线路由器。 D-Link DI-7100G C1 20250928及之前版本存在安全漏洞，该漏洞源于对文件/webchat/hi_block.asp中参数popupId的错误操作，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-7100G C1 20250928 -

II. Public POCs for CVE-2025-11339

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III. Intelligence Information for CVE-2025-11339

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Vendor Advisories for CVE-2025-11339 (1)

Vendor Pages for CVE-2025-11339 (1)

Same Patch Batch · D-Link · 2025-10-06 · 3 CVEs total

CVE-2025-11338 8.8 HIGH D-Link DI-7100G C1 jhttpd login.cgi sub_4C0990 buffer overflow
CVE-2025-11335 4.7 MEDIUM D-Link DI-7100G C1 jhttpd msp_info.htm sub_46409C command injection

IV. Related Vulnerabilities

Same product: DI-7100G C1
Same vendor: D-Link
Same weakness: CWE-120

V. Comments for CVE-2025-11339

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