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CVE-2026-91003— D-Link DI-8300 CGI Service rzgl.asp rzgl_asp stack-based overflow

Quick assessment

Affected
D-Link DI-8300
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.

在 D-Link DI-8300 固件版本 16.07 中发现了一个缺陷。受影响的部分是 CGI 服务组件中 文件里的 函数。该函数在处理 参数时，引发了基于栈的缓冲区溢出。该漏洞可被远程利用，且相关的利用代码（exploit）已经公开，可能会被攻击者使用。

CVSS 9.1 · Critical

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-91003

Vulnerability Information
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Vulnerability Title
D-Link DI-8300 CGI Service rzgl.asp rzgl_asp stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been found in D-Link DI-8300 16.07. The affected element is the function rzgl_asp of the file /rzgl.asp of the component CGI Service. This manipulation of the argument redirct_url causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been published and may be used.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/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

Affected Products

Vendor Product Affected Versions CPE Subscribe
D-Link DI-8300 16.07 cpe:2.3:h:d-link:di-8300:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-91003

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III. Intelligence Information for CVE-2026-91003

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Proof of Concept for CVE-2026-91003 (1)

Security Blog Posts for CVE-2026-91003 (1)

Vendor Pages for CVE-2026-91003 (1)

Same Patch Batch · D-Link · 2026-09-15 · 4 CVEs total

CVE-2026-91001 9.9 CRITICAL D-Link DI-8400 DDNS Configuration ddns.asp ddns_asp stack-based overflow
CVE-2026-90880 7.4 HIGH D-Link DSL-3782 Diagnostics Diagnostics.asp system command injection
CVE-2026-90881 5.3 MEDIUM D-Link DIR-882 CGI Binary dllog.cgi main information disclosure

IV. Related Vulnerabilities

Same vendor: D-Link
Same weakness: CWE-121

V. Comments for CVE-2026-91003

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