CVE-2026-1773IEC 60870-5-104 used in RTU500: Potential Denial of Service impact on reception of invalid U-format frame.
Updated under an hour ago ()
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It affects hitachienergy rtu540_firmware and 3 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-184
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
hitachienergy rtu540_firmware hitachienergy:rtu540_firmware | from 12.7.1 through 12.7.7; from 13.5.1 through 13.5.4; from 13.6.1 through 13.6.2; from 13.7.1 before 13.7.8; 13.8.1 | NVD |
hitachienergy rtu560_firmware hitachienergy:rtu560_firmware | from 12.7.1 through 12.7.7; from 13.5.1 through 13.5.4; from 13.6.1 through 13.6.2; from 13.7.1 before 13.7.8; 13.8.1 | NVD |
hitachienergy rtu520_firmware hitachienergy:rtu520_firmware | from 12.7.1 through 12.7.7; from 13.5.1 through 13.5.4; from 13.6.1 through 13.6.2; from 13.7.1 before 13.7.8; 13.8.1 | NVD |
hitachienergy rtu530_firmware hitachienergy:rtu530_firmware | from 12.7.1 through 12.7.7; from 13.5.1 through 13.5.4; from 13.6.1 through 13.6.2; from 13.7.1 before 13.7.8; 13.8.1 | NVD |
References
- https://publisher.hitachienergy.com/preview?DocumentID=8DBD000237&LanguageCode=en&DocumentPartId=&Action=Launchvendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.