CVE-2025-49458 is a medium-severity buffer overflow vulnerability classified under CWE-120, affecting Zoom Communications, Inc's Zoom Workplace Clients. The vulnerability arises from a classic buffer copy operation that does not properly check the size of the input before copying it into a buffer. This flaw can be exploited by an authenticated user with network access to the vulnerable Zoom Workplace Client, potentially causing a denial of service (DoS) condition. The vulnerability does not impact confidentiality or integrity directly but affects availability by crashing or destabilizing the client application. The CVSS 3.1 base score is 6.5, reflecting a network attack vector with low attack complexity, requiring privileges (authenticated user), and no user interaction. The scope remains unchanged, meaning the impact is limited to the vulnerable component. No known exploits are currently reported in the wild, and no patches or fixes have been linked yet. The affected versions are unspecified but presumably include certain releases prior to the publication date. The vulnerability is significant because Zoom Workplace Clients are widely used for enterprise collaboration, and a DoS could disrupt business communications and workflows.

For European organizations, this vulnerability poses a risk primarily to the availability of Zoom Workplace Clients used in corporate environments. A successful exploitation could disrupt meetings, collaboration sessions, and internal communications, leading to operational downtime and productivity loss. Although it does not compromise data confidentiality or integrity, the denial of service could affect critical business processes, especially in sectors relying heavily on remote collaboration tools, such as finance, healthcare, and government agencies. The requirement for authenticated access limits the attack surface to insiders or compromised accounts, but insider threats or lateral movement by attackers could still leverage this vulnerability. Given the widespread adoption of Zoom in Europe, the impact could be significant in organizations with large distributed workforces or those that have integrated Zoom deeply into their communication infrastructure.

Organizations should prioritize the following mitigations: 1) Monitor for updates and patches from Zoom Communications and apply them promptly once available. 2) Restrict access to Zoom Workplace Clients to trusted and authenticated users only, employing strong authentication mechanisms such as multi-factor authentication (MFA) to reduce the risk of account compromise. 3) Implement network segmentation and access controls to limit the ability of potentially malicious authenticated users to reach vulnerable clients. 4) Employ endpoint protection solutions capable of detecting abnormal application crashes or behavior that may indicate exploitation attempts. 5) Educate users about the risks of insider threats and encourage reporting of unusual application behavior. 6) Consider deploying application whitelisting or sandboxing techniques to contain potential crashes and prevent cascading failures. 7) Regularly review and audit user privileges to minimize the number of users with access to vulnerable clients.