CVE-2016-9218 in Hybrid Meeting Server
Summary
by MITRE
A vulnerability in Cisco Hybrid Meeting Server could allow an unauthenticated, remote attacker to conduct a cross-site request forgery (CSRF) attack against the user of the web interface. More Information: CSCvc28662. Known Affected Releases: 1.0.
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Analysis
by VulDB Data Team • 05/14/2026
The vulnerability identified as CVE-2016-9218 resides within Cisco Hybrid Meeting Server version 1.0, representing a critical cross-site request forgery flaw that compromises the security of the web interface. This vulnerability stems from insufficient validation of cross-site requests, allowing malicious actors to exploit the system without authentication. The flaw specifically affects the server's web-based management interface, creating a dangerous attack surface where unauthorized users can manipulate the system through forged requests. The vulnerability's classification under CWE-352 indicates a well-established weakness in web application security related to CSRF protection mechanisms. According to the Cisco Security Advisory CSCvc28662, the issue manifests when legitimate users interact with the web interface, making it particularly dangerous as it leverages the trust relationship between the user and the server. The attack vector requires minimal privileges since no authentication is needed to initiate the CSRF attack, making it accessible to any remote attacker with network connectivity to the affected system. This vulnerability directly impacts the integrity and availability of the Hybrid Meeting Server's web interface, potentially allowing attackers to perform unauthorized actions such as modifying configuration settings, accessing sensitive data, or disrupting meeting services.
The technical exploitation of this CSRF vulnerability occurs through the manipulation of web requests that are automatically processed by the user's browser when interacting with the Cisco Hybrid Meeting Server. Attackers can craft malicious web pages or emails containing forged requests that, when visited by an authenticated user, execute unintended commands on the server. The vulnerability exists because the server fails to implement proper anti-CSRF tokens or other validation mechanisms to verify that requests originate from legitimate sources within the same session. This weakness allows attackers to bypass authentication requirements entirely, as the forged requests appear to come from authenticated users. The attack typically involves embedding malicious code in web pages or email attachments that automatically submit requests to the server's web interface when the user visits the page. The server processes these requests without proper verification, treating them as legitimate commands from authenticated users. This flaw aligns with ATT&CK technique T1566.001, which describes social engineering attacks through malicious web content, and represents a classic example of how web application security controls can be circumvented through improper input validation. The vulnerability's impact extends beyond simple data manipulation to potentially disrupt meeting services and compromise the overall security posture of organizations relying on the Hybrid Meeting Server for collaborative communications.
The operational impact of CVE-2016-9218 presents significant risks to organizations utilizing Cisco Hybrid Meeting Server version 1.0, particularly in enterprise environments where secure collaboration platforms are critical. Successful exploitation can lead to unauthorized configuration changes, data breaches, and service disruption that affects business continuity. The vulnerability's remote nature means that attackers can target the system from anywhere on the internet without requiring physical access or prior authentication, making it particularly dangerous in cloud-based or externally accessible deployments. Organizations may experience unauthorized access to meeting records, modification of user permissions, or complete service compromise that affects all users of the platform. The lack of authentication requirements for initiating the attack means that even casual browsing of malicious content could result in system compromise, creating a broad attack surface that extends beyond traditional network boundaries. Security teams face increased risk of unauthorized access to collaboration platforms that often contain sensitive business information, meeting minutes, and user communications. The vulnerability also impacts the principle of least privilege, as attackers can perform actions that should be restricted to authorized administrators. This flaw can potentially be combined with other vulnerabilities to create more severe attack scenarios, particularly in environments where the Hybrid Meeting Server interacts with other systems or services. The impact on business operations includes potential compliance violations, reputational damage, and increased security incident response requirements. Organizations must consider the broader implications of this vulnerability on their overall security infrastructure, as it represents a fundamental weakness in web application security controls that could be exploited to gain unauthorized access to critical collaboration services. The vulnerability's presence in version 1.0 indicates a lack of proper security testing or validation during the development lifecycle, highlighting the importance of implementing comprehensive security controls throughout the software development life cycle. Organizations should implement immediate mitigations including network segmentation, access controls, and monitoring solutions to detect and prevent exploitation attempts. The vulnerability also underscores the need for regular security assessments and timely patch management processes to prevent similar issues from affecting other network infrastructure components.