Severity: CriticalAction: Mitigate
Hitachi Energy RTU500 Product
Mitigate
No complete fix is indicated yet.
Vulnerability record
CVE-2026-9852
Severity: ElevatedExploitation: No known exploitation
Patch status
No official fix confirmed yet
Until a fix ships, follow the vendor's mitigations, limit exposure of affected systems, and watch this record for a patch.
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.
Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.
Intelligence timeline
Developments from the last 30 days, newest first.
- CVSS scoredUpdate
CVE-2026-9852 scored CVSS 4.6
Basis: NIST National Vulnerability Database