HIGH SeverityCVSS 4.08.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVE-2026-1773

Last updated Feb 28, 2026 · Published Feb 24, 2026

Description

IEC 60870-5-104: 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.

Affected products

1 listed

Hitachi Energy:RTU500 series CMU firmware

Mappings

CWE

CWE-184

CAPEC

CAPEC-278