How to fix CVE-2025-50673?

Within 24 hours: Inventory all D-Link DI-8003 routers and confirm firmware version via administrative console; verify if affected firmware 16.07.26A1 is deployed. Within 7 days: Check D-Link support website for available firmware updates beyond 16.07.26A1 and deploy if available; if no update exists, implement network segmentation to restrict /webgl.asp endpoint access to trusted administrative networks only. Within 30 days: Evaluate replacement or end-of-life status of DI-8003 devices; migrate to supported router models with active security maintenance if no patch is released by vendor.

Is D-Link affected by CVE-2025-50673?

CVE-2025-50673 affects D-Link DI-8003 routers (firmware 16.07.26A1) and enables unauthenticated remote denial-of-service attacks through a buffer overflow vulnerability in the web interface.

CVE-2025-50673

EUVD-2025-209363 HIGH

2026-04-08 mitre

GHSA-5qqr-9hw8-qvc9

7.5

CVSS 3.1

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Apr 08, 2026 - 19:31 vuln.today

EUVD ID Assigned

Apr 08, 2026 - 19:31 euvd

EUVD-2025-209363

CVE Published

Apr 08, 2026 - 00:00 nvd

HIGH 7.5

Description

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.

Analysis

Buffer overflow in D-Link DI-8003 router firmware 16.07.26A1 allows unauthenticated remote attackers to trigger denial-of-service conditions by sending malformed http_lanport parameter values to the /webgl.asp endpoint. Network-accessible attack requires no user interaction or privileges. Exploitation causes availability impact only with no confidentiality or integrity compromise. Low observed exploitation activity (EPSS <1%). No public exploit identified at time of analysis.

Technical Context

Classic stack/heap buffer overflow (CWE-120) caused by insufficient input validation on http_lanport parameter processing in web management interface. Improper bounds checking allows oversized input to corrupt memory, triggering application crash without enabling code execution or data exfiltration per CVSS impact metrics (C:N/I:N/A:H).

Affected Products

D-Link DI-8003 industrial router, firmware version 16.07.26A1. Vendor D-Link Corporation. Specific version range unknown; only 16.07.26A1 confirmed vulnerable.

Remediation

No vendor-released patch identified at time of analysis. Monitor D-Link security bulletin at https://www.dlink.com/en/security-bulletin/ for forthcoming firmware updates addressing CVE-2025-50673. Interim mitigations: restrict management interface access to trusted administrative networks only via firewall rules, disable remote web administration if not operationally required, implement network segmentation isolating affected devices from untrusted networks. Consider replacing device if vendor discontinues support. Verify current support status before deployment decisions. Reference NVD entry https://nvd.nist.gov/vuln/detail/CVE-2025-50673 for updated remediation guidance.

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.0

CVSS: +38

POC: 0

CVE-2025-50673 vulnerability details – vuln.today

Back

CVE-2025-50673

CVSS Vector

Lifecycle Timeline

Tags

Description

Analysis

Technical Context

Affected Products

Remediation

Priority Score

Share

CVE-2025-50673

CVSS Vector

Lifecycle Timeline

Tags

Description

Analysis

Technical Context

Affected Products

Remediation

Priority Score

Share

External POC / Exploit Code