CVE-2026-116769 in Secure Access
Summary
by MITRE • 11/02/2026
CVE-2026-116769 is an authentication bypass vulnerability in Secure Access servers starting with version 13.0 and prior to 14.61. Attackers can modify security settings of a client via the server.
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Analysis
by VulDB Data Team • 11/02/2026
The identified vulnerability, designated as CVE-2026-116769, represents a critical authentication bypass flaw within Secure Access servers operating on versions from 13.0 up to but not including version 14.61. This security defect fundamentally undermines the integrity of the access control mechanisms by allowing unauthorized actors to manipulate client-side security configurations through server interactions. The core technical issue lies in the insufficient validation and authorization checks performed when handling requests that modify client settings, enabling an attacker with network-level access or valid credentials for a lower-privilege account to alter critical parameters without proper authentication verification. This flaw effectively allows the bypass of intended security controls, leading to potential unauthorized configuration changes that can compromise the entire secure access infrastructure.
From a technical perspective, this vulnerability aligns closely with CWE-287, which describes Improper Authentication, and specifically relates to scenarios where an actor is able to impersonate another user or bypass authentication mechanisms entirely by exploiting logic errors in how client settings are processed. The attack vector likely involves crafting specific HTTP requests or API calls that target the endpoint responsible for updating client configurations. Because the server fails to adequately verify whether the requesting entity has the requisite privileges to make such changes, it accepts and applies these modifications as if they originated from an authorized administrator or system process. This lack of strict access control enforcement creates a pathway for privilege escalation within the management plane, allowing attackers to reconfigure security policies, disable logging mechanisms, or alter connection parameters in ways that facilitate further exploitation.
The operational impact of this vulnerability is severe and multifaceted. By modifying client security settings, an attacker can effectively weaken the defensive posture of connected endpoints or gateways. This could involve disabling multi-factor authentication requirements for specific users, altering firewall rules to allow unrestricted access from malicious IP addresses, or changing encryption parameters to facilitate man-in-the-middle attacks. Such manipulations erode trust in the secure access infrastructure and can lead to widespread unauthorized access to protected resources. Furthermore, because these changes are applied via the server, they may persist across sessions and affect multiple clients simultaneously if the vulnerability is exploited at scale, resulting in a significant degradation of organizational security posture and potential compliance violations with standards such as NIST SP 800-53 or ISO/IEC 27001.
In terms of threat modeling, this activity corresponds to ATT&CK technique T1098.004, which involves SSH Authorized Key Modification, although in the context of Secure Access servers, it more broadly maps to unauthorized configuration changes that facilitate lateral movement or persistence. Attackers can leverage these altered settings to establish persistent access points within the network environment. The ability to modify security settings remotely without proper authentication bypasses traditional perimeter defenses and internal segmentation controls, making detection challenging unless comprehensive logging and anomaly monitoring are in place. This vulnerability highlights the critical importance of implementing robust input validation and strict role-based access control on all administrative interfaces and configuration endpoints.
To mitigate this risk, organizations running Secure Access servers within the affected version range must immediately apply vendor-provided patches that update to version 14.61 or later. Until patching is feasible, administrators should implement network-level restrictions to limit access to management interfaces only from trusted IP addresses using firewalls or VPN tunnels with strong authentication. Additionally, enabling detailed audit logging for all configuration changes and monitoring for anomalous patterns in client setting modifications can help detect exploitation attempts early. It is also advisable to review existing security policies to ensure that no critical settings are left modifiable by low-privilege accounts, thereby reducing the attack surface even if similar vulnerabilities exist elsewhere in the system architecture.