Cyber Resilience

CVE-2025-50667

High

Published: 08 April 2026

Published
08 April 2026
Modified
10 April 2026
KEV Added
—
Patch
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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0006 18.0th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-50667 is a high-severity Classic Buffer Overflow (CWE-120) vulnerability in Dlink Di-8003 Firmware. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 18.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Deeper analysis

A buffer overflow vulnerability, tracked as CVE-2025-50667 and published on 2026-04-08, affects the D-Link DI-8003 device running firmware version 16.07.26A1. The issue stems from improper handling of the "iface" parameter in the /wan_line_detection.asp endpoint, corresponding to CWE-120. It has a CVSS v3.1 base score of 7.5, rated as high severity due to its network accessibility and potential for disruption.

Remote attackers require no authentication or user interaction to exploit this vulnerability over the network with low complexity. By sending a specially crafted request to the vulnerable endpoint, an attacker can trigger the buffer overflow, resulting in a denial of service condition through application crash or device reboot, as indicated by the high availability impact (A:H) in the CVSS vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Mitigation details and advisories are referenced in the D-Link security bulletin at https://www.dlink.com/en/security-bulletin/ and the IoT vulnerability collection on GitHub at https://github.com/xiaotea/iot-vulnerability-collection/blob/main/README.md.

EU & UK References

Vulnerability details

A buffer overflow vulnerability exists in D-Link DI-8003 16.07.26A1 due to improper handling of the iface parameter in the /wan_line_detection.asp endpoint.

CWE(s)
CWE-120

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1499.004 Application or System Exploitation Impact
Adversaries may exploit software vulnerabilities that can cause an application or system to crash and deny availability to users.
attack.mitre.org →
Why these techniques?

Unauthenticated remote buffer overflow on public web endpoint enables T1190 (Exploit Public-Facing Application) and directly produces DoS via crash/reboot (T1499.004 Application or System Exploitation).

Confidence: MEDIUM · MITRE ATT&CK Enterprise v18.1

CVEs Like This One

CVE-2025-50646Same product: Dlink Di-8003
CVE-2025-50652Same product: Dlink Di-8003
CVE-2025-50673Same product: Dlink Di-8003
CVE-2025-50649Same product: Dlink Di-8003
CVE-2025-50665Same product: Dlink Di-8003
CVE-2025-50653Same product: Dlink Di-8003
CVE-2025-50645Same product: Dlink Di-8003
CVE-2025-50672Same product: Dlink Di-8003
CVE-2025-50644Same product: Dlink Di-8003
CVE-2025-50669Same product: Dlink Di-8003

Affected Assets

dlink
di-8003 firmware
16.07.26a1

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match
prevent

Directly mitigates the buffer overflow by enforcing validation of the improperly handled 'iface' parameter in the /wan_line_detection.asp endpoint.

SI-2 Flaw Remediation good match
prevent

Requires timely remediation of the identified buffer overflow flaw in D-Link DI-8003 firmware version 16.07.26A1 via patching.

SC-5 Denial-of-service Protection partial match
prevent

Protects against the denial-of-service impact resulting from remote exploitation of the buffer overflow vulnerability.

References