CVE-2025-50666
Published: 08 April 2026
Summary
CVE-2025-50666 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 22.6th 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).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Requires timely remediation of the buffer overflow flaw in the /web_post.asp endpoint via D-Link firmware updates to eliminate the vulnerability.
Mandates validation of HTTP GET parameters such as name, en, user_id, log, and time to block crafted inputs causing buffer overflows.
Deploys memory protections like stack canaries or non-executable stacks to mitigate buffer overflow exploits resulting in device crashes.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Buffer overflow in public web endpoint (/web_post.asp) enables remote unauthenticated exploitation of a network device for DoS via crafted HTTP requests (T1190); maps directly to application/system exploitation causing crash/reboot (T1499.004).
NVD Description
A buffer overflow vulnerability exists in D-Link DI-8003 16.07.26A1 due to improper handling of multiple parameters in the /web_post.asp endpoint. An attacker can exploit this vulnerability by sending a crafted HTTP GET request in parameters such as name, en, user_id,…
more
log, and time.
Deeper analysisAI
CVE-2025-50666 is a buffer overflow vulnerability (CWE-120) in the D-Link DI-8003 device running firmware version 16.07.26A1. The issue stems from improper handling of multiple parameters in the /web_post.asp endpoint, which can be triggered by a crafted HTTP GET request targeting parameters such as name, en, user_id, log, and time. Published on 2026-04-08, it carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), indicating high severity primarily due to its potential for availability disruption.
An unauthenticated attacker with network access can exploit this vulnerability remotely with low complexity and no user interaction required. By sending a specially crafted HTTP GET request to the affected endpoint, the attacker triggers the buffer overflow, leading to a denial-of-service condition such as device crash or reboot, without impacting confidentiality or integrity.
D-Link has issued security advisories addressing this vulnerability, including bulletin SAP10505 available via their US support announcement page and general security bulletin portal. Additional details appear in community collections like the IoT vulnerability repository on GitHub. Practitioners should consult these references for firmware updates or mitigation guidance specific to the DI-8003.
Details
- CWE(s)