Cyber Resilience

CVE-2025-50644

High

Published: 08 April 2026

Published
08 April 2026
Modified
22 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 0.0005 17.3th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-50644 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 17.3th 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 SC-5 (Denial-of-service Protection) and SI-10 (Information Input Validation).

Deeper analysis

CVE-2025-50644 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 validation of user input processed by the qj.asp endpoint, resulting in 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).

An unauthenticated remote attacker with network access to the device can exploit this vulnerability through low-complexity attacks requiring no user interaction. Exploitation triggers a buffer overflow that causes a denial-of-service condition, severely impacting device availability while leaving confidentiality and integrity unaffected.

D-Link has issued security advisories for this issue, including publication SAP10505 at https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10505 and general security bulletins at https://www.dlink.com/en/security-bulletin/. The vulnerability is also documented in an IoT vulnerability collection at https://github.com/xiaotea/iot-vulnerability-collection/blob/main/README.md. Practitioners should review these resources for recommended patches and mitigation steps.

EU & UK References

Vulnerability details

A buffer overflow vulnerability exists in D-Link DI-8003 16.07.26A1 due to improper validation of user input in the qj.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 qj.asp web endpoint enables remote unauthenticated exploitation for DoS via application/system crash.

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-2025-50673Same 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-2025-50667Same product: Dlink Di-8003
CVE-2025-50672Same 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 enforces validation of user-supplied input at endpoints like qj.asp to prevent buffer overflows from malformed data.

SI-2 Flaw Remediation good match
prevent

Requires timely remediation of flaws such as this buffer overflow via vendor firmware patches referenced in D-Link advisories.

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

Limits the effects of denial-of-service conditions triggered by unauthenticated remote buffer overflow exploitation.

References