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CVE-2026-91001

CRITICALCVSS 9.9/10EPSS 0.48%

Last modified

CVE-2026-91001 is a critical-severity vulnerability rated 9.9/10 on the CVSS scale. 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. EPSS estimates a 0.48% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
9.9/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS 4.0
8.6/10

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability
0.48%

40.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
D-LinkDI-840016.07

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2026-91001?
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.
How severe is CVE-2026-91001?
CVE-2026-91001 has a CVSS score of 9.9/10 (CRITICAL severity). The EPSS model estimates a 0.48% probability of exploitation in the next 30 days.
How do I fix CVE-2026-91001?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST