CVE-2026-35616 Scanner

FortiClient EMS is a management tool for managing all FortiClient installations in enterprises, ensuring policy enforcement and endpoint integration with FortiSandbox for comprehensive threat protection. It is primarily used by IT administrators in organizations that require secure management of their endpoint security solutions. FortiClient EMS supports integration with Active Directory and can automate deployment and management tasks. It is used across various industries, including finance, healthcare, and education, to maintain strong security postures. The software ensures that endpoint devices comply with organization policies and provides visibility into potential threats. With this tool, administrators can manage hundreds of devices and ensure uniform security settings.

The Authentication Bypass vulnerability allows attackers to spoof client verification processes to gain unauthorized access. This malicious activity bypasses security measures, potentially leading to further system compromises. Attackers can exploit this flaw by intercepting communications and altering verification processes without detection. It relies on manipulating headers and the response behavior of the server to bypass authentication checks. This vulnerability threatens the integrity of secure communications within the network. It is critical for organizations using this software to address this vulnerability to prevent unauthorized data access.

The technical details involve the manipulation of the "X-SSL-CLIENT-VERIFY" header in server requests. Attackers can send requests pretending that the client certificate has been verified successfully, thus testing if the server is vulnerable. If the Apache server does not strip the spoofed header before requests reach Django, it indicates vulnerability. The vulnerability exists in versions where Apache fails to adequately verify client certificates against the spoofed header. An attacker can exploit this vulnerability without prior authentication or credentials. The use of status codes and message verification determines the vulnerability's presence.

If exploited, this vulnerability allows unauthorized access to sensitive data and network resources. Attackers could potentially execute further attacks within the network, such as data exfiltration or distribution of malware. It might provide easy access points for attackers who wish to navigate other areas within the network infrastructure. There is also a risk of unauthorized data or configuration changes being made to the EMS server. Organizations could face legal and compliance issues if sensitive information is breached due to unaddressed vulnerabilities. Overall, exploitation can lead to financial losses, reputational damage, and operational disruptions.

REFERENCES

• https://bishopfox.com/blog/api-authentication-bypass-in-forticlient-ems-7-4-5-7-4-6-cve-2026-35616
• https://nvd.nist.gov/vuln/detail/CVE-2026-35616