Memory Overflow Vulnerability in Citrix NetScaler ADC and Gateway

CVE-2025-7776

What is CVE-2025-7776?

CVE-2025-7776 is a memory overflow vulnerability found in the Citrix NetScaler ADC and Gateway products. These components serve as essential application delivery controllers and VPN gateways for organizations, enabling secure remote access and optimized application performance. The memory overflow can lead to unpredictable behaviors and erroneous outcomes when the system is configured as a Gateway with specific profiles like PCoIP. This vulnerability not only affects the functionality of the NetScaler ADC and Gateway, but it can also cause denial of service, severely affecting an organization's operations and risking downtime, which can ultimately hinder business continuity and service availability.

Potential impact of CVE-2025-7776

1. Denial of Service: The primary impact of CVE-2025-7776 is the potential for denial of service, where the application may become unresponsive, preventing users from accessing critical applications and resources, leading to significant operational disruptions.

2. Erroneous Behavior: The memory overflow might result in unpredictable system behavior, which can compromise the integrity of operations and lead to data loss or corruption, risking sensitive information and impacting service reliability.

3. Increased Attack Surface: By exploiting this vulnerability, attackers could leverage the resulting instabilities to conduct further malicious activities within the network, increasing the risk of additional cybersecurity threats and complicating incident response efforts.

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