CVE-2026-24380 is a missing authorization vulnerability identified in the Metagauss EventPrime product, specifically affecting versions up to and including 4.2.8.0. The vulnerability arises from improperly configured access control mechanisms within the eventprime-event-calendar-management module, which fails to enforce correct authorization checks. This misconfiguration allows attackers with low-level privileges (PR:L) to perform unauthorized actions over the network (AV:N) without requiring user interaction (UI:N). The vulnerability impacts confidentiality, integrity, and availability (C:H/I:H/A:H), indicating that an attacker could potentially access sensitive event data, modify or delete event information, and disrupt event management services. The CVSS 3.1 base score of 8.8 reflects the high severity and ease of exploitation due to low attack complexity (AC:L). Although no exploits have been reported in the wild yet, the vulnerability's nature makes it a critical risk for organizations relying on EventPrime for managing event calendars and related workflows. The lack of available patches at the time of reporting necessitates immediate risk mitigation through compensating controls. The vulnerability was published on January 22, 2026, and assigned by Patchstack, indicating credible recognition and tracking within the security community.

For European organizations, the impact of CVE-2026-24380 can be significant, especially for those using Metagauss EventPrime to manage critical event scheduling and coordination. Unauthorized access could lead to exposure of confidential event details, including sensitive corporate or governmental meetings, potentially resulting in espionage or competitive disadvantage. Integrity compromise could allow attackers to alter event data, causing operational disruptions, missed deadlines, or misinformation dissemination. Availability impacts could interrupt event management services, affecting business continuity and stakeholder trust. Sectors such as government, finance, healthcare, and large enterprises with complex event coordination are particularly vulnerable. The network-based exploitation vector means that attackers can attempt remote compromise, increasing the attack surface. Given the high CVSS score, the vulnerability could be leveraged in targeted attacks or as a foothold for broader network intrusion campaigns within European entities.

1. Monitor Metagauss communications for vendor patch releases and apply updates to EventPrime promptly once available. 2. Until patches are released, implement strict network segmentation to isolate EventPrime servers from untrusted networks and limit access to authorized personnel only. 3. Enforce robust access control policies and review user privileges regularly to minimize the number of users with low-level privileges that could exploit this vulnerability. 4. Deploy intrusion detection and prevention systems (IDS/IPS) to detect anomalous access patterns or unauthorized attempts to manipulate event calendar data. 5. Conduct thorough security audits and penetration testing focused on EventPrime deployments to identify and remediate access control weaknesses. 6. Educate administrators and users about the risks of unauthorized access and encourage reporting of suspicious activities. 7. Consider implementing multi-factor authentication (MFA) for accessing EventPrime management interfaces to add an additional security layer. 8. Maintain comprehensive logging and monitoring of EventPrime activities to enable rapid incident response if exploitation is suspected.