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CVE-2026-17539

Hitachi Energy / RTU500 series CMU firmware PUBLISHED

Description (CNA)

RTU500 has a vulnerability, where high-load scenarios, such as sending GI requests at short intervals, may cause a NULL pointer dereference in the last entry of the enhanced message queue. This can cause a BCI_IEC104 fatal write error, resulting in connection interruption and restart, and ultimately a denial of service for bidirectional IEC 60870-5-104 communication.

Affected (CNA)

Vendor / productVersions
Hitachi Energy / RTU500 series CMU firmwareaffected 12.7.1 through 12.7.7; affected 13.5.1 through 13.5.4; affected 13.6.1 through 13.6.3; affected 13.7.1 through 13.7.8; affected 13.8.1 through 13.8.2

CWE

CWE-476

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.