CVE-2026-91001Network attack vector

Memory corruption via oversized DDNS parameters

Published Sep 15, 2026 · Updated Sep 15, 2026

Stack-based buffer overflow in D-Link DI-8400 16.07 allows remote attackers to corrupt memory through crafted DDNS fields. The ddns_asp handler for /ddns.asp fails to enforce adequate bounds on the serv, user, host, wild, mx, bmx, cust, and ip parameters before using them in stack storage. Reachability requires network access to the DDNS configuration endpoint; authentication requirements and code execution are not established.

CVSS severityUnavailable
Unscored
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in D-Link DI-8400 16.07 allows remote attackers to corrupt memory through crafted DDNS fields. The ddns_asp handler for /ddns.asp fails to enforce adequate bounds on the serv, user, host, wild, mx, bmx, cust, and ip parameters before using them in stack storage. Reachability requires network access to the DDNS configuration endpoint; authentication requirements and code execution are not established.

The record

CVE
CVE-2026-91001
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
D-Link
Product
DI-8400
Classifications
T1210
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=16.07

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

D-Link · DI-8400version=16.07

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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