CVE-2025-7639

AVEVA Enterprise SCADA Deserialization of Untrusted Data

Security Updates Contact your AVEVA Technical Support representative, Customer Success Manager, Account Manager, or Solution Integrator to obtain the security update best applicable to the product version currently deployed in your environment: Servers: • AVEVA Enterprise SCADA v2025 P1 or higher • AVEVA Enterprise SCADA v2024 SP1 P2 • AVEVA Enterprise SCADA v2023 SP1 P1 • AVEVA Enterprise SCADA v2022 SP2 P3 • AVEVA Enterprise SCADA v2021 SP2 P6 • AVEVA Pipeline Operations for Gas/Liquids v2025 P1 or higher • AVEVA Pipeline Operations for Gas/Liquids v2024 SP1 P2 • AVEVA Pipeline Operations for Gas/Liquids v2023 SP1 P1 • AVEVA Pipeline Operations for Gas/Liquids v2022 SP2 P3 • AVEVA Pipeline Operations for Gas/Liquids v2021 SP2 P6 Clients: • AVEVA Enterprise SCADA HMI v2024 R2 HF7 or higher • AVEVA Enterprise SCADA HMI v2024 P1 • AVEVA Enterprise SCADA HMI v2023 P2 HF1 • AVEVA Pipeline Integrity Monitor (delivered on Pipeline Simulation media) v2025 SP1 P2 or higher • AVEVA Pipeline Training Simulator (delivered on Pipeline Simulation media) v2025 SP1 P2 or higher • Measurement Advisor 2025 P1 or higher • Measurement Advisor 2021 SP1 HF16

Apply Secure Serialization Settings To fully mitigate the risk of exploit, the following configuration changes must be implemented after all server and client nodes have been upgraded to compatible versions that support the fix: Server Components: • Change “BinarySerializer” -> “Mode” setting from ‘Binary Formatter’ to ‘Json’. • Change “BinarySerializer” -> “AcceptBinaryFormattedData” setting from ‘true’ to ‘false’. • Re-cache the XOS Event Handlers assembly Client Components: • Configure clients/products that interface with Enterprise SCADA to only use JSON serialization. HMI: • Migrate HMI displays For step-by-step instructions on where and how to apply these configuration settings, how to migrate HMI displays, compatible server-client versions list, and additional details please refer to KB117814 “AVEVA Midstream Product Bulletin – Removal of Binary Formatter” https://softwaresupportsp.aveva.com/en-US/knowledge/details/000117814 .

AVEVA recommends that customers using affected product versions should perform the following to mitigate the risk of exploit: * Evaluate the impact of these vulnerabilities based on your operational environment, architecture, and product implementation. * Plan an upgrade of Servers and Clients to one of the available fixed versions listed in section “Security Updates”. * Configure Servers and Clients as described in section “Apply Secure Serialization Settings”.

For more information on this vulnerability, including security updates, users should see the security bulletin AVEVA-2026-005. https://www.aveva.com/content/dam/aveva/documents/support/cyber-security-updates/SecurityBulletin_AVEVA-2026-005.pdf