CVE-2026-1507 is a vulnerability identified in the AVEVA PI Data Archive PI Server, a core component of the AVEVA PI System widely used for real-time data collection and management in industrial environments. The flaw stems from an uncaught exception (CWE-248) within the PI Server software, which can be triggered remotely by an unauthenticated attacker. Exploiting this vulnerability causes the core PI services to crash, leading to a denial-of-service condition. The vulnerability has a CVSS 3.1 base score of 7.5, reflecting high severity due to its network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), and no user interaction needed (UI:N). The scope is unchanged (S:U), and the impact is solely on availability (A:H) with no confidentiality or integrity impact. The vulnerability affects all versions indicated as '0' in the data, which likely means the initial or unspecified versions of the product. No patches or exploit code are currently available, but the risk remains significant due to the critical nature of the PI Server in industrial process control and data archival. The uncaught exception likely arises from insufficient input validation or error handling in the server’s network-facing components, allowing crafted network packets or requests to trigger the crash. This vulnerability could be leveraged by attackers to disrupt industrial operations, causing downtime and potential safety risks in environments relying on continuous data availability.

For European organizations, especially those in manufacturing, energy, utilities, and critical infrastructure sectors that use AVEVA PI Systems, this vulnerability poses a significant risk of operational disruption. The denial-of-service condition can halt data collection and monitoring processes, impairing decision-making and automated control systems dependent on real-time data. This can lead to production downtime, financial losses, and in some cases, safety hazards if critical systems lose visibility or control. The lack of confidentiality or integrity impact reduces the risk of data theft or manipulation, but availability loss alone can have severe consequences in industrial contexts. The vulnerability’s ease of exploitation without authentication increases the threat level, as attackers can remotely target exposed PI Servers without needing insider access. European organizations with remote access or insufficiently segmented industrial networks are particularly vulnerable. The absence of known exploits in the wild provides a window for proactive mitigation, but the high severity score underscores the urgency of addressing this issue.

1. Immediately implement network segmentation to isolate AVEVA PI Data Archive PI Servers from general IT networks and limit exposure to untrusted networks, including the internet. 2. Restrict access to PI Server network ports using firewalls and access control lists (ACLs) to allow only trusted hosts and management stations. 3. Monitor PI Server logs and network traffic for unusual connection attempts or service crashes that may indicate exploitation attempts. 4. Employ intrusion detection/prevention systems (IDS/IPS) tuned to detect anomalies in PI Server communications. 5. Coordinate with AVEVA support and subscribe to official advisories to obtain patches or updates as soon as they become available. 6. Conduct regular backups of PI Server configurations and data archives to enable rapid recovery in case of service disruption. 7. Review and harden error handling and input validation configurations if customizable within the PI Server environment. 8. Limit remote access capabilities and enforce multi-factor authentication for administrative interfaces to reduce attack surface. 9. Prepare incident response plans specifically addressing denial-of-service scenarios impacting industrial data systems.