Cyber Resilience

CVE-2025-50673

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 0.0003 8.6th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-50673 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 8.6th 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-16 (Memory Protection).

Deeper analysis

CVE-2025-50673 is a buffer overflow vulnerability (CWE-120) in the D-Link DI-8003 device running firmware version 16.07.26A1. The flaw arises from improper handling of the http_lanport parameter in the /webgl.asp endpoint, which can lead to memory corruption when processing malformed input.

Remote attackers require no privileges or user interaction to exploit this vulnerability over the network with low complexity. The CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) indicates that successful exploitation results in high availability impact, such as device crashes or reboots, while confidentiality and integrity remain unaffected.

Advisories and further details, including potential mitigations or patches, are documented in references such as the iot-vulnerability-collection on GitHub at https://github.com/xiaotea/iot-vulnerability-collection/blob/main/README.md and D-Link's security bulletin page at https://www.dlink.com/en/security-bulletin/. Security practitioners should review these sources for firmware updates or configuration guidance.

EU & UK References

Vulnerability details

A buffer overflow vulnerability exists in D-Link DI-8003 16.07.26A1 due to improper handling of the http_lanport parameter in the /webgl.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?

Buffer overflow in public web endpoint (/webgl.asp) directly enables remote exploitation of a network device (T1190) resulting in system/application crash and denial of service (T1499.004).

Confidence: HIGH · 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-2025-50649Same 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-2025-50667Same 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 addresses the buffer overflow by requiring validation and sanitization of the http_lanport parameter in the /webgl.asp endpoint to prevent malformed input from causing memory corruption.

SI-16 Memory Protection good match
prevent

Implements memory protections such as stack guards or address space randomization to mitigate exploitation of the buffer overflow vulnerability leading to crashes.

SI-2 Flaw Remediation good match
prevent

Requires timely remediation of the identified buffer overflow flaw through firmware updates as referenced in D-Link security bulletins.

References