CVE-2026-9852: CWE-1236 Improper neutralization of formula elements in a CSV file in Hitachi Energy MicroSCADA SYS600
Description
A CSV injection vulnerability exists in SYS600. Injected malicious formulas can add or modify data to the spreadsheet, insert links, exfiltrate data, and in some cases, depending on how the user has their environment configured, execute malicious code on the user’s machine. To exploit this issue attackers would need a way to create arbitrary log messages. This could be achieved through normal functionality via SCIL scripts, a log injection vulnerability, or via the SYS600 broker. This vulnerability affects all Windows users regardless of their privilege level who can run the Notify service and export the log.
CVSS v4.0
Score 4.6medium
Affected software
Hitachi Energy
MicroSCADA SYS600
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-9852) in Hitachi Energy MicroSCADA SYS600 version 10.0 involves improper neutralization of formula elements in CSV files (CWE-1236). Attackers able to inject arbitrary log messages can embed malicious spreadsheet formulas that may alter data, insert links, exfiltrate information, or execute code on the user's machine depending on environment settings. The attack vector includes normal functionality through SCIL scripts, log injection vulnerabilities, or the SYS600 broker. The vulnerability impacts Windows users capable of running the Notify service and exporting logs, without requiring elevated privileges.
Potential Impact
The vulnerability allows attackers to inject malicious formulas into CSV files generated by the system, which can lead to unauthorized data modification, data exfiltration, and potentially remote code execution on affected Windows machines depending on user environment configurations. The attack requires the ability to create arbitrary log messages but does not require elevated privileges, increasing the risk for all users with Notify service access.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict or monitor the ability to create arbitrary log messages via SCIL scripts, log injection, or the SYS600 broker. Users should exercise caution when exporting and opening CSV files from SYS600, especially on Windows systems. Follow any additional guidance provided by Hitachi Energy once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Hitachi Energy
- Date Reserved
- 2026-05-28T15:04:54.747Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a992adaacd9273b49a53d88
Added to database: 09/03/2026, 08:07:54 UTC
Last enriched: 09/07/2026, 13:16:08 UTC
Last updated: 10/17/2026, 18:48:24 UTC
Views: 92
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