Stack-Based Buffer Overflow in D-Link DIR-868L Authentication Component

CVE-2026-94089

What is CVE-2026-94089?

CVE-2026-94089 is a critical vulnerability found in the D-Link DIR-868L router, specifically within its authentication component. This issue arises from a stack-based buffer overflow in the strcpy function housed in the /webfa_authentication.cgi file. The vulnerability enables an attacker to manipulate the arguments related to authentication credentials (like ID and password), allowing the exploit to be executed remotely. Organizations utilizing the D-Link DIR-868L router may face significant operational risks, including unauthorized access and control over their networks, leading to possible data breaches or compromise of sensitive information.

Potential Impact of CVE-2026-94089

1. Unauthorized Remote Access: The vulnerability allows attackers to gain remote access to the router, potentially leading to full control over the network. Once accessed, adversaries could manipulate network settings, intercept communications, or deploy further malicious software.

2. Data Breach Risks: Exploiting this vulnerability could result in sensitive data exposure, allowing attackers to access personal information or corporate data stored within the network. This increased risk of data theft can severely undermine an organization's confidentiality and trustworthiness.

3. Compromise of Connected Devices: With control over the router, attackers could target other devices connected to the network, facilitating broader exploitation across an organization’s infrastructure. This could lead to the deployment of ransomware or other forms of malware, escalating the potential damage significantly.

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