CVE-2025-7639
AVEVA Enterprise SCADA Deserialization of Untrusted Data
02 Description
AVEVA Enterprise SCADA Deserialization of Untrusted Data
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 0.57% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 46.9% of scored records. A rank, not a probability.
- NVD base score
- 6.1 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- NVD analysis status
- Deferred. NVD last modified this record on 2026-09-29.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-08-14 18:46Z2 MO AGO
- Last updated
- 2026-08-17 20:01Z2 MO AGO
- Reserved
- 2025-07-14
- Assigning CNA
- icscert
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 6.1)
- CNA CVSS vector
- CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
- Weaknesses
- CWE-502Deserialization of Untrusted DataBase
- Data version
- 5.2
- Document digest
- a31cd311dbff3e4868c4deb938ef38f72ce077e778675d0a31c08d3365ebc61c
05 Affected products
06 References
- www.aveva.comhttps://www.aveva.com/content/dam/aveva/documents/support/cyber-security-updates/SecurityBulletin_AVEVA-2026-005.pdf
- www.cisa.govhttps://www.cisa.gov/news-events/ics-advisories/icsa-26-225-01
- github.comhttps://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-225-01.json
07 Remediation
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