CVE-2026-1773
7.5 · HIGHOverview
CVE-2026-1773 is a high-severity vulnerability affecting hitachienergy rtu540_firmware. It was published on February 24, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
IEC 60870-5-104 used in RTU500: Potential Denial of Service impact on reception of invalid U-format frame. Product is only affected if IEC 60870-5-104 bi-directional functionality is configured. Enabling secure communication following IEC 62351-3 does not remediate the vulnerability but mitigates the risk of exploitation.
Remediation
Check the references section for vendor advisories and patches from hitachienergy. Update rtu540_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| hitachienergy | rtu540_firmware | 12.7.1 | Affected |
| hitachienergy | rtu560_firmware | 12.7.1 | Affected |
| hitachienergy | rtu520_firmware | 12.7.1 | Affected |
| hitachienergy | rtu530_firmware | 12.7.1 | Affected |
Frequently Asked Questions
What is CVE-2026-1773?
CVE-2026-1773 is a high-severity vulnerability affecting hitachienergy rtu540_firmware. It was published on February 24, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2026-1773?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-1773?
Check the references section for vendor advisories and patches from hitachienergy. Update rtu540_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-1773?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-1773 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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