CVE-2026-7857— D-Link DI-8100 CGI user_group.asp sprintf buffer overflow
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I. Basic Information for CVE-2026-7857
Vulnerability Information
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Vulnerability Title
D-Link DI-8100 CGI user_group.asp sprintf buffer overflow
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability has been found in D-Link DI-8100 16.07.26A1. This vulnerability affects the function sprintf of the file /user_group.asp of the component CGI Handler. The manipulation leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
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CGI Handler组件中文件/user_group.asp的函数sprintf导致缓冲区溢出，可能导致远程攻击。
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
II. Public POCs for CVE-2026-7857
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 8390 chars
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III. Intelligence Information for CVE-2026-7857
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- CVE-2026-7857 | D-Link DI-8100 16.07.26A1 CGI /user_group.asp sprintf buffer overflowvdb-entrytechnical-description
- https://nvd.nist.gov/vuln/detail/CVE-2026-7857
Same Patch Batch · D-Link · 2026-05-05 · 6 CVEs total
| CVE-2026-7854 | 9.8 CRITICAL | D-Link DI-8100 POST Parameter url_rule.asp url_rule_asp buffer overflow |
| CVE-2026-7853 | 9.8 CRITICAL | D-Link DI-8100 HTTP auto_reboot.asp sprintf buffer overflow |
| CVE-2026-7855 | 8.8 HIGH | D-Link DI-8100 HTTP Request tggl.asp tggl_asp buffer overflow |
| CVE-2026-7856 | 7.2 HIGH | D-Link DI-8100 Web Management url_member.asp buffer overflow |
| CVE-2026-7851 | 7.2 HIGH | D-Link DI-8100 yyxz.asp sprintf stack-based overflow |
IV. Related Vulnerabilities
Same product: DI-8100
- CVE-2026-7856
D-Link DI-8100 Web Management url_member.asp buffer overflow - CVE-2026-7855
D-Link DI-8100 HTTP Request tggl.asp tggl_asp buffer overflo - CVE-2026-7854
D-Link DI-8100 POST Parameter url_rule.asp url_rule_asp buff - CVE-2026-7853
D-Link DI-8100 HTTP auto_reboot.asp sprintf buffer overflow - CVE-2026-7851
D-Link DI-8100 yyxz.asp sprintf stack-based overflow
Same vendor: D-Link
- CVE-2026-8273
D-Link DNS-320 system_mgr.cgi cgi_merge_user os command inje - CVE-2026-8272
D-Link DNS-320 webfile_mgr.cgi chown os command injection - CVE-2026-8271
D-Link DNS-320 network_mgr.cgi cgi_upnp_edit os command inje - CVE-2026-8260
D-Link DCS-935L HNAP Service hnap_service SetDeviceSettings - CVE-2026-7856
D-Link DI-8100 Web Management url_member.asp buffer overflow
Same weakness: CWE-120
- CVE-2026-8260
D-Link DCS-935L HNAP Service hnap_service SetDeviceSettings - CVE-2026-8137
Totolink X5000R formDdns sub_458E40 buffer overflow - CVE-2026-6691
MongoDB C Driver Cyrus SASL Canonicalization Buffer Overflow - CVE-2026-7856
D-Link DI-8100 Web Management url_member.asp buffer overflow - CVE-2026-7855
D-Link DI-8100 HTTP Request tggl.asp tggl_asp buffer overflo
V. Comments for CVE-2026-7857
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