CVE-2026-97717 in Secure Access
Summary
by MITRE • 10/07/2026
CVE-2026-97717 is a vulnerability in the proxy sub-system of Secure Access servers prior to 14.60. Authenticated attackers can send malformed data to the server and cause a persistent denial of service.
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as CVE-2026-97717 represents a significant security flaw within the proxy subsystem of Secure Access servers operating on versions prior to 14.60. This issue is classified under CWE-400, which denotes uncontrolled resource consumption, specifically manifesting as a persistent denial of service condition. The core technical nature of this vulnerability lies in the server's inability to properly validate or handle malformed data inputs directed at its proxy services. When an attacker successfully transmits crafted, malformed packets or requests to the affected system, it triggers an internal error state that prevents the server from recovering gracefully. Unlike transient crashes that might resolve after a restart or timeout, this flaw results in a persistent disruption of service, meaning the denial of service condition remains active until manual intervention occurs, such as restarting the specific proxy process or rebooting the entire appliance.
The operational impact of CVE-2026-97717 is severe for organizations relying on these Secure Access servers for network connectivity and security enforcement. Because the vulnerability requires authentication to exploit, it targets users who have already gained a foothold within the system's access controls. This could include compromised legitimate user accounts or insiders with malicious intent. Once exploited, the persistent denial of service effectively removes the server from active duty, disrupting all traffic routed through its proxy functions. For critical infrastructure or enterprise environments where continuous availability is paramount, this can lead to significant operational downtime, loss of productivity, and potential cascading failures in dependent systems that rely on the secure access gateway for connectivity. The persistence of the issue exacerbates the impact by requiring administrative effort to restore service, thereby increasing mean time to recovery compared to transient vulnerabilities.
From a threat modeling perspective, this vulnerability aligns with ATT&CK technique T1499, Endpoint Denial of Service, specifically under sub-techniques related resource exhaustion or loop injection that lead to persistent system unavailability. The requirement for authentication places it within the context of lateral movement or insider threats rather than remote code execution from an anonymous attacker. However, in environments where credential theft is common via phishing or other initial access vectors, this vulnerability becomes a potent tool for attackers aiming to disrupt operations after gaining entry. It serves as both a disruption mechanism and potentially a distraction technique while other malicious activities are conducted elsewhere on the network.
Mitigation strategies must focus primarily on version management and strict input validation practices. The most effective immediate remediation is to upgrade all affected Secure Access servers to version 14.60 or later, where this flaw in the proxy subsystem has been addressed by the vendor through improved data handling logic and robust error recovery mechanisms. In scenarios where immediate patching is not feasible due to maintenance windows or compatibility concerns, organizations should implement strict access control lists to limit which authenticated users can interact with the vulnerable proxy endpoints. Additionally, deploying web application firewalls or intrusion prevention systems that inspect for malformed request patterns may help mitigate exploitation attempts by blocking suspicious traffic before it reaches the server's processing logic. Regular auditing of authentication logs and monitoring for unusual resource consumption patterns can also aid in early detection of potential exploitation activities.