CVE-2026-91001: critical vulnerability in D-Link DI-8400
D-Link DI-8400 DDNS Configuration ddns.asp ddns_asp stack-based overflow
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
48Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 9.4epss 0.9%
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:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
Affected products
D-Link · DI-8400public PoCs found — 1
cve_referencegithub.com/Vivi-Xray/Xray-s-cve-/blob/main/ddns_asp/ddns_asp.pyunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — D-Link DI-8400
In the same product, most dangerous first.
CVE-2025-8175HIGHD-Link DI-8400 jhttpd usb_paswd.asp null pointer dereferenceEPSS 1.8%CVE-2025-9938HIGHD-Link DI-8400 yyxz.asp yyxz_dlink_asp stack-based overflowEPSS 1.6%CVE-2026-101081CRITICALD-Link DI-8400 Web Administration Service menu_nat_more.asp menu_nat_more_asp stack-based overflowEPSS 0.5%CVE-2026-10206HIGHD-Link DI-8400 dbsrv.asp stack-based overflowEPSS 0.5%