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CVE-2025-6881— D-Link DI-8100 jhttpd pppoe_base.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 16.07.21版本存在安全漏洞，该漏洞源于文件/pppoe_base.asp中参数mschap_en的错误操作导致缓冲区溢出。

CVSS 8.8 · High EPSS 0.82% · P55

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-6881

Vulnerability Information
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Vulnerability Title
D-Link DI-8100 jhttpd pppoe_base.asp buffer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in D-Link DI-8100 16.07.21. It has been rated as critical. Affected by this issue is some unknown functionality of the file /pppoe_base.asp of the component jhttpd. The manipulation of the argument mschap_en leads to buffer overflow. The attack may be launched 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-8100 安全漏洞
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 16.07.21版本存在安全漏洞，该漏洞源于文件/pppoe_base.asp中参数mschap_en的错误操作导致缓冲区溢出。
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 16.07.21 -

II. Public POCs for CVE-2025-6881

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III. Intelligence Information for CVE-2025-6881

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Vendor Pages for CVE-2025-6881 (1)

Same Patch Batch · D-Link · 2025-06-30 · 8 CVEs total

CVE-2025-6882 8.8 HIGH D-Link DIR-513 formSetWanPPTP buffer overflow
CVE-2025-6899 6.3 MEDIUM D-Link DI-7300G+/DI-8200G msp_info.htm os command injection
CVE-2025-6898 6.3 MEDIUM D-Link DI-7300G+ in proxy_client.asp os command injection
CVE-2025-6896 6.3 MEDIUM D-Link DI-7300G+ wget_test.asp os command injection
CVE-2025-6897 5.5 MEDIUM D-Link DI-7300G+ httpd_debug.asp os command injection
CVE-2025-6932 3.7 LOW D-Link DCS-7517 Qlync Password Generation httpd g_F_n_GenPassForQlync hard-coded password
CVE-2025-6931 3.7 LOW D-Link DCS-6517/DCS-7517 Root Password Generation httpd generate_pass_from_mac entropy

IV. Related Vulnerabilities

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

V. Comments for CVE-2025-6881

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