# CVE-2026-91001

## Summary

- **CVE ID:** CVE-2026-91001
- **Severity:** CRITICAL
- **CVSS Score:** 9.9 (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)
- **CWE:** CWE-121, CWE-119
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 15, 2026

## 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.

## Affected Products

- D-Link — DI-8400 (16.07)

## References

- [CNA](https://vuldb.com/vuln/403582)
- [CNA](https://vuldb.com/vuln/403582/cti)
- [CNA](https://vuldb.com/cve/CVE-2026-91001)
- [CNA](https://vuldb.com/submit/931642)
- [CNA](https://github.com/Vivi-Xray/Xray-s-cve-/tree/main/ddns_asp)
- [CNA](https://github.com/Vivi-Xray/Xray-s-cve-/blob/main/ddns_asp/ddns_asp.py)
- [CNA](https://www.dlink.com/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.48%
- **EPSS Percentile:** 40.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._