Remote Code Execution Vulnerability in Cisco NX-OS Software

CVE-2026-76471

What is CVE-2026-76471?

CVE-2026-76471 is a significant remote code execution vulnerability identified in Cisco’s NX-OS Software, which is designed to enhance network infrastructure reliability and automation through its NX-API feature. This vulnerability stems from inadequate input validation of data sent to the NX-API, allowing an unauthenticated remote attacker to send specially crafted HTTP requests. A successful exploitation of this flaw could enable the attacker to execute arbitrary code with root privileges on affected devices or cause a denial of service (DoS) condition, severely impairing network operations. The implications of this vulnerability extend beyond mere system compromise, as it exposes critical network infrastructure to potential manipulation and service interruptions.

Potential Impact of CVE-2026-76471

1. Unauthorized Remote Code Execution: The most critical impact of this vulnerability is the possibility for attackers to execute arbitrary code with root privileges. This level of access can give them full control over the affected device, enabling them to alter configurations, steal sensitive information, or integrate malicious aspects into the network.

2. Denial of Service (DoS): This vulnerability can cause process crashes that lead to device reloads, resulting in denied services to legitimate users. A successful exploit may disrupt network operations, leading to outages or degraded performance, which can have severe repercussions for business continuity.

3. Increased Risk of Network Breaches: By exploiting CVE-2026-76471, attackers could potentially gain a foothold in the network, facilitating further attacks, data theft, or lateral movement across connected infrastructure. This exposure increases the overall attack surface and heightens vulnerability to other cyber threats, especially if the compromised server is not properly isolated or monitored.

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