Hitachi Energy RTU500 Product

First reported by CISA Cybersecurity Advisories, concerning Hitachi Energy, RTU500, the Recommended Immediate Actions.

1 day ago By HelpMeTrack News Desk Tech & AI

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HelpMeTrack began tracking this technology story after CISA Cybersecurity Advisories reported it on 20 Oct 2026, concerning Hitachi Energy, RTU500, the Recommended Immediate Actions.

Tracked as 9 CVEs, including CVE-2026-11856, CVE-2026-17539, CVE-2026-28388, the flaw is rated HIGH with a CVSS score of 7.5 out of 10, classified as CWE-476 NULL Pointer Dereference. Follow general mitigation factors/workarounds

Key facts

CVE: CVE-2026-11856, CVE-2026-17539, CVE-2026-28388, CVE-2026-6276, CVE-2026-6653, CVE-2026-6732, CVE-2026-8927, CVE-2026-8932, CVE-2026-9079
Severity: HIGH (CVSS 7.5/10)
Vulnerability type: CWE-476 NULL Pointer Dereference
Official mitigation: Follow general mitigation factors/workarounds

Why we're tracking this

We found 2 related reports from CISA Cybersecurity Advisories covering this development. We've tracked 1 further update as more reporting came in. We'll keep this page updated as the story develops, with links to the original reporting below.

Development timeline

20 Oct, 03:58 UTC First reported by CISA Cybersecurity Advisories
21 Oct, 07:00 UTC Confirmed again by CISA Cybersecurity Advisories