HIGHCVE-2026-1773Published Modified CNA Hitachi Energy
CVE-2026-1773: IEC 60870-5-104 used in RTU500: Potential Denial of Service impact on reception of invalid U-format frame
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.
Metrics
- CVSS v4.0
- 8.7
- Severity
- HIGH
- Fixed in
- —
- Affected Products
- 1
Affected packages
- Hitachi Energy / RTU500 series CMU firmware≤ 12.7.7 · ≤ 13.5.4 · ≤ 13.6.2 · ≤ 13.7.7 · 13.8.1
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NReferences