CVE-2026-76467 in Campus Gateway Software
Summary
by MITRE • 10/07/2026
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco networking engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.
The vulnerabilities tracked by CVE-2026-76467 are related to issues concerning improper control of a resource through its lifetime that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-664.
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Analysis
by VulDB Data Team • 10/07/2026
Cisco has released a software hardening update addressing multiple internally discovered vulnerabilities, with CVE-2026-76467 specifically highlighting issues related to improper control of resources throughout their lifecycle. This vulnerability falls under the Common Weakness Enumeration category CWE-664, which encompasses weaknesses where a resource is not properly managed during its existence within an application or system. The root cause typically involves failures in allocating, initializing, using, and releasing resources such as memory handles, file descriptors, network connections, or database cursors. When these operations are mishandled, the software may fail to release allocated resources after they are no longer needed, leading to resource leaks that can degrade system performance over time.
The operational impact of CWE-664 vulnerabilities is primarily centered on availability and stability rather than direct confidentiality or integrity breaches in most cases. As a network device continues to operate with improperly managed resources, it gradually consumes more memory or other critical system assets until exhaustion occurs. This state often results in application crashes, service interruptions, or complete device unresponsiveness. In the context of Cisco networking equipment, such instability can lead to significant downtime for connected networks, disrupting traffic flow and potentially causing cascading failures across dependent systems. While some resource management flaws might be leveraged to trigger denial-of-service conditions more rapidly through crafted inputs, the primary risk remains the gradual degradation of system reliability due to accumulated unreleased resources.
From a threat modeling perspective, these vulnerabilities align with ATT&CK techniques related to Resource Hijacking and Denial of Service. Attackers may attempt to accelerate resource exhaustion by triggering specific code paths repeatedly or by maintaining long-lived connections that prevent proper cleanup routines from executing. Although the internal review identified these issues proactively before external exploitation was widely observed, the potential for malicious actors to exploit timing windows in resource allocation makes timely patching essential. The lack of strict lifecycle management means that even routine operational loads could theoretically contribute to instability if combined with specific trigger conditions or high-volume traffic patterns designed to stress the affected components.
Mitigation strategies focus on applying the provided software hardening release immediately to ensure that proper cleanup routines are enforced for all managed resources. Administrators should verify that their devices have successfully updated to the patched version and monitor system logs for any signs of resource exhaustion warnings prior to patching, as existing leaks may already be impacting performance. Additionally, implementing network segmentation can limit the blast radius if a vulnerability is exploited before full deployment across the infrastructure. Regular auditing of resource usage patterns during stress testing phases helps identify potential weak points in lifecycle management that might not manifest under normal operating conditions but could become critical under attack scenarios or peak load situations.