CVE-2025-49460 is a vulnerability classified under CWE-400, which pertains to uncontrolled resource consumption, affecting Zoom Communications, Inc's Zoom Workplace Clients. This vulnerability allows an unauthenticated attacker to exploit the application via network access to trigger a denial of service (DoS) condition. Specifically, the flaw arises because the affected Zoom Workplace Clients do not properly manage or limit resource usage when processing certain network requests, enabling an attacker to overwhelm the system's resources such as CPU, memory, or network bandwidth. The vulnerability does not impact confidentiality or integrity but affects availability by potentially causing the application or service to become unresponsive or crash. The CVSS v3.1 base score is 4.3 (medium severity), with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), but requiring user interaction (UI:R), and affecting availability only (A:L). The requirement for user interaction suggests that the attack might need a user to perform some action, such as opening a malicious link or file, to trigger the resource exhaustion. No known exploits are reported in the wild, and there are no patches currently linked, indicating that mitigation may rely on vendor updates or configuration changes once available. The affected versions are unspecified beyond "0," which likely means all current versions or a placeholder for versions to be updated. This vulnerability highlights the risk of denial of service attacks against enterprise communication tools, which are critical for business continuity and remote collaboration.

For European organizations, this vulnerability poses a risk primarily to the availability of Zoom Workplace Clients, which are widely used for internal and external communications, meetings, and collaboration. A successful DoS attack could disrupt business operations, delay communications, and reduce productivity, especially in organizations heavily reliant on Zoom for remote work. Critical sectors such as finance, healthcare, government, and education could face operational interruptions, potentially impacting service delivery and compliance with regulatory requirements for availability and continuity. Although the vulnerability does not compromise data confidentiality or integrity, the denial of service could indirectly affect incident response and crisis management capabilities. Given the medium severity and the need for user interaction, the threat may be more targeted or opportunistic rather than widespread automated exploitation. However, the network accessibility and lack of required privileges mean attackers could attempt to exploit this vulnerability remotely, increasing the attack surface. Organizations with large deployments of Zoom Workplace Clients should be vigilant, as disruption in communication platforms can have cascading effects on coordination and decision-making processes.

To mitigate this vulnerability, European organizations should implement the following specific measures: 1) Monitor Zoom Workplace Client usage and network traffic for unusual spikes or patterns indicative of resource exhaustion attempts. 2) Apply strict network segmentation and firewall rules to limit exposure of Zoom client services to untrusted networks or external sources. 3) Educate users about the risks of interacting with unsolicited links or files that could trigger the vulnerability, reinforcing security awareness training. 4) Deploy endpoint protection solutions capable of detecting abnormal resource consumption or application behavior related to Zoom clients. 5) Coordinate with Zoom Communications for timely updates or patches addressing this vulnerability and prioritize their deployment once available. 6) Consider implementing rate limiting or traffic shaping at network gateways to prevent excessive requests from overwhelming Zoom clients. 7) Maintain robust incident response plans that include procedures for communication platform outages to minimize operational impact. These targeted actions go beyond generic advice by focusing on network controls, user behavior, and proactive monitoring tailored to the nature of this vulnerability.