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CVE-2025-4883— D-Link DI-8100 Connection Limit Page ctxz.asp ctxz_asp stack-based overflow

Quick assessment

Affected
D-Link DI-8100
Exploitation
Public or AI PoC available; prioritize validation
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版本存在安全漏洞，该漏洞源于对文件/ctx.asp中参数def/defTcp/defUdp/defIcmp/defOther的错误操作导致栈缓冲区溢出。

CVSS 7.2 · High EPSS 8.16% · P95

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-4883

Vulnerability Information
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Vulnerability Title
D-Link DI-8100 Connection Limit Page ctxz.asp ctxz_asp stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in D-Link DI-8100 16.07.26A1. It has been declared as critical. This vulnerability affects the function ctxz_asp of the file /ctxz.asp of the component Connection Limit Page. The manipulation of the argument def/defTcp/defUdp/defIcmp/defOther leads to stack-based 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:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
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 16.07.26A1版本存在安全漏洞，该漏洞源于对文件/ctx.asp中参数def/defTcp/defUdp/defIcmp/defOther的错误操作导致栈缓冲区溢出。
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-2025-4883

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 128934 chars
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III. Intelligence Information for CVE-2025-4883

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News Coverage for CVE-2025-4883 (1)

Vendor Pages for CVE-2025-4883 (1)

Same Patch Batch · D-Link · 2025-05-18 · 5 CVEs total

CVE-2025-4901 4.3 MEDIUM D-Link DI-7003GV2 HTTP Endpoint state_view.data sub_41E304 information disclosure
CVE-2025-4860 2.4 LOW D-Link DAP-2695 Static Pool Settings Page adv_dhcps.php cross site scripting
CVE-2025-4859 2.4 LOW D-Link DAP-2695 MAC Bypass Settings Page adv_macbypass.php cross site scripting
CVE-2025-4858 2.4 LOW D-Link DAP-2695 ARP Spoofing Prevention Page adv_arpspoofing.php cross site scripting

IV. Related Vulnerabilities

Same product: DI-8100
Same vendor: D-Link
Same weakness: CWE-121

V. Comments for CVE-2025-4883

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