CVE-2025-66379 is a vulnerability identified in Pexip Infinity, a widely used video conferencing and collaboration platform. The flaw stems from improper input validation within the media implementation, specifically related to how media streams are processed. An attacker can craft a malicious media stream that triggers a reachable assertion failure (CWE-617) in the software. This assertion failure causes the application to abort unexpectedly, leading to a denial of service condition. The vulnerability is remotely exploitable over the network without requiring any authentication or user interaction, making it particularly dangerous in exposed environments. The CVSS v3.1 base score of 7.5 indicates a high severity level, primarily due to the impact on availability (A:H) and the low attack complexity (AC:L). Although no exploits have been reported in the wild yet, the potential for disruption is significant, especially for organizations relying heavily on Pexip Infinity for real-time communications. The vulnerability affects all versions prior to 39.0, and no official patches or mitigations have been published at the time of disclosure. This vulnerability highlights the importance of robust input validation in media processing components, which are often complex and exposed to untrusted data streams. Without proper validation, attackers can cause software crashes that disrupt services and degrade user experience.

For European organizations, the primary impact of CVE-2025-66379 is denial of service against Pexip Infinity deployments. This can disrupt critical video conferencing and collaboration services, affecting internal communications, remote work, and customer interactions. In sectors such as finance, healthcare, government, and large enterprises where Pexip Infinity is used for secure and reliable communications, service outages can lead to operational delays, reduced productivity, and potential reputational damage. Additionally, denial of service incidents may increase support costs and require emergency incident response. Since the vulnerability does not compromise confidentiality or integrity, data breaches are unlikely; however, the availability impact alone can have serious business consequences. The ease of exploitation without authentication means attackers can target exposed Pexip Infinity servers directly, increasing the risk of widespread disruption if not mitigated. Organizations with remote or hybrid workforces relying on video conferencing are particularly vulnerable to operational impacts from this vulnerability.

1. Upgrade Pexip Infinity to version 39.0 or later as soon as the patch becomes available, as this version addresses the input validation flaw. 2. Until patches are deployed, implement network-level controls such as firewall rules or media gateway filtering to restrict incoming media streams to trusted sources only. 3. Monitor network traffic for anomalous or malformed media streams that could indicate exploitation attempts. 4. Employ intrusion detection/prevention systems (IDS/IPS) with signatures or heuristics targeting malformed media packets. 5. Conduct regular vulnerability assessments and penetration testing focused on media processing components to identify similar weaknesses. 6. Establish incident response procedures to quickly isolate and recover affected Pexip Infinity services in case of a DoS attack. 7. Educate IT and security teams about this vulnerability to ensure rapid detection and remediation. 8. Where possible, segment Pexip Infinity servers from general internet exposure, limiting access to internal or VPN-only users to reduce attack surface.