CVE-2026-91001: Stack-based Buffer Overflow in D-Link DI-8400
CVE-2026-91001 is a critical stack-based buffer overflow vulnerability in the D-Link DI-8400 router firmware version 16.07. The flaw exists in the ddns_asp function of the /ddns.asp file within the DDNS Configuration component. An attacker can remotely trigger this vulnerability by manipulating specific arguments, potentially leading to severe impacts. Exploit code has been publicly released, increasing the risk of attacks.
AI Analysis
Technical Summary
This vulnerability affects the D-Link DI-8400 router running firmware version 16.07. The issue is a stack-based buffer overflow in the ddns_asp function of the /ddns.asp file, specifically in the DDNS Configuration component. Remote attackers can exploit this by manipulating the serv/user/host/wild/mx/bmx/cust/ip arguments, causing a buffer overflow on the stack. The vulnerability has a CVSS 4.0 score of 9.4, indicating critical severity, and exploit code is publicly available.
Potential Impact
Successful exploitation of this vulnerability can lead to severe consequences such as remote code execution or denial of service due to the stack-based buffer overflow. Given the critical CVSS score and the availability of public exploit code, affected devices are at high risk of compromise if exposed to untrusted networks.
Mitigation Recommendations
No patch or official fix information is currently available for this vulnerability. Users should check the vendor's advisory for updates. Until a fix is released, it is recommended to restrict access to the affected device's management interfaces from untrusted networks to reduce exposure.
CVE-2026-91001: Stack-based Buffer Overflow in D-Link DI-8400
Description
CVE-2026-91001 is a critical stack-based buffer overflow vulnerability in the D-Link DI-8400 router firmware version 16.07. The flaw exists in the ddns_asp function of the /ddns.asp file within the DDNS Configuration component. An attacker can remotely trigger this vulnerability by manipulating specific arguments, potentially leading to severe impacts. Exploit code has been publicly released, increasing the risk of attacks.
CVSS v4.0
Score 9.4critical
Affected software
D-Link
DI-8400
cpe:2.3:h:d-link:di-8400:*:*:*:*:*:*:*:*AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects the D-Link DI-8400 router running firmware version 16.07. The issue is a stack-based buffer overflow in the ddns_asp function of the /ddns.asp file, specifically in the DDNS Configuration component. Remote attackers can exploit this by manipulating the serv/user/host/wild/mx/bmx/cust/ip arguments, causing a buffer overflow on the stack. The vulnerability has a CVSS 4.0 score of 9.4, indicating critical severity, and exploit code is publicly available.
Potential Impact
Successful exploitation of this vulnerability can lead to severe consequences such as remote code execution or denial of service due to the stack-based buffer overflow. Given the critical CVSS score and the availability of public exploit code, affected devices are at high risk of compromise if exposed to untrusted networks.
Mitigation Recommendations
No patch or official fix information is currently available for this vulnerability. Users should check the vendor's advisory for updates. Until a fix is released, it is recommended to restrict access to the affected device's management interfaces from untrusted networks to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-09-14T15:34:55.062Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aa8d86255bf5e2cf535b5cd
Added to database: 09/15/2026, 05:32:18 UTC
Last enriched: 09/15/2026, 05:46:27 UTC
Last updated: 09/15/2026, 06:01:21 UTC
Views: 12
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