CVE-2026-97716 in Secure Access
Summary
by MITRE • 10/07/2026
CVE-2026-97716 is a vulnerability in the connection set up sub-system of Secure Access servers prior to version 14.60. Unauthenticated attackers can send specially crafted traffic to the server and cause a persistent denial of service.
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Analysis
by VulDB Data Team • 10/07/2026
The identified security flaw, designated as CVE-2026-97716, resides within the connection setup subsystem of Secure Access servers running versions prior to 14.60. This vulnerability represents a critical failure in the initial handshake and authentication phases of network communication protocols managed by the server infrastructure. The core technical deficiency lies in the insufficient validation or resource management logic applied during the establishment of new connections from unauthenticated sources. When an external actor interacts with this subsystem, the server fails to properly handle specific malformed or specially crafted packets, leading to a state where the service becomes unable to process legitimate requests effectively. This is not merely a transient glitch but a persistent condition that requires administrative intervention or a system restart to resolve, indicating a significant breakdown in resilience mechanisms designed to protect against resource exhaustion attacks.
From an operational perspective, this vulnerability enables unauthenticated attackers to execute a denial of service attack with minimal effort and no prior credentials. The ability to trigger this state remotely without authentication significantly lowers the barrier for exploitation, allowing any internet-facing actor or internal network user with access to the server's entry points to disrupt services. The impact is severe as it directly affects the availability component of the CIA triad, which is paramount for Secure Access servers that typically serve as gateways for remote workforce connectivity and sensitive data transmission. A persistent denial of service means that legitimate users are locked out of critical applications and resources hosted behind or managed by these servers, potentially causing substantial business disruption, loss of productivity, and reputational damage depending on the scope of the affected infrastructure.
In terms of industry standard classifications, this vulnerability aligns with CWE-400, which describes uncontrolled resource consumption leading to denial of service conditions. The specific mechanism involves improper handling of input during connection establishment, which can also be categorized under CWE-20 if it relates to improper input validation that allows the crafted traffic to bypass expected constraints. Furthermore, within the context of offensive security frameworks such as MITRE ATT&CK, this behavior is consistent with techniques found in the Impact tactic, specifically resource hijacking or denial of service actions like T1499 Endpoint Denial of Service or network-level disruptions depending on whether the exhaustion occurs at the application layer or lower. The lack of authentication requirement places it firmly within remote attack vectors that do not require user interaction or privilege escalation prior to exploitation.
Mitigation strategies must prioritize immediate remediation through software updates, as the vendor has released version 14.60 which addresses this specific flaw in the connection setup logic. Organizations should verify their current server versions and apply patches promptly to close this exposure window. In environments where patching cannot be implemented immediately due to operational constraints, network-level mitigations such as rate limiting on incoming connections from untrusted networks can help mitigate the impact by restricting the volume of new connection attempts that trigger the vulnerability. Additionally, implementing strict firewall rules or Web Application Firewall policies that inspect and drop malformed packets during the handshake phase may provide a temporary layer of defense against exploitation until the underlying software defect is resolved through official updates.