Critical severity · published Sep 15, 2026
CVE-2026-91001
D-Link DI-8400 DDNS Configuration ddns.asp ddns_asp stack-based overflow
9.9
CVSS
0.9%
EPSS
No
On KEV
Description
A security flaw has been discovered in D-Link DI-8400 16.07. This affects the function ddns_asp of the file /ddns.asp of the component DDNS Configuration. Performing a manipulation of the argument serv/user/host/wild/mx/bmx/cust/ip results in stack-based buffer overflow. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 60% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DI
DI-8400 · D-Link
16.07 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-91001
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-91001
github.com
https://github.com/Vivi-Xray/Xray-s-cve-/blob/main/ddns_asp/ddns_asp.py
github.com
https://github.com/Vivi-Xray/Xray-s-cve-/tree/main/ddns_asp
vuldb.com
https://vuldb.com/cve/CVE-2026-91001
vuldb.com
https://vuldb.com/submit/931642
vuldb.com
https://vuldb.com/vuln/403582
vuldb.com
https://vuldb.com/vuln/403582/cti
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