EUVD-2026-78273
GHSA-gqwf-9wg7-q94q
Severity by source
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
Network-reachable web interface requires low-privilege authentication; scope change applies as router compromise affects all downstream network traffic.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
Lifecycle Timeline
5DescriptionCVE.org
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.
AnalysisAI
Stack-based buffer overflow in the D-Link DI-8400 router (firmware 16.07) allows authenticated remote attackers to overwrite stack memory via oversized input to any of eight parameters - serv, user, host, wild, mx, bmx, cust, or ip - handled by the ddns_asp() function at the /ddns.asp DDNS configuration endpoint. Successful exploitation can yield arbitrary code execution on the device, giving an attacker full control over the router. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires: (1) network access to the D-Link DI-8400 web management interface on its configured HTTP port; (2) valid authentication credentials sufficient to access DDNS configuration - the CVSS 4.0 vector assigns PR:L, indicating low-privilege authentication is sufficient rather than requiring full admin credentials, though in practice DDNS config on D-Link devices is typically admin-gated; (3) the device must be running firmware 16.07. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.6 reflects network-reachable exploitation (AV:N), low complexity (AC:L), and low-privilege authentication (PR:L), with high impact across vulnerable and subsequent systems. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch has been identified at time of analysis - D-Link has not published a firmware update or security advisory addressing this vulnerability. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an immediate inventory scan to identify all D-Link DI-8400 units running firmware 16.07 and audit administrative access logs for unauthorized configuration changes or suspicious access patterns. …
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Same weakness CWE-121 – Stack-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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