CVE-2026-17539
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.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 5.9
- CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS probability
- 0.35%
- CWE
- CWE-476
- Published
- 2026-09-03
- Last modified
- 2026-09-03
Affected products
- Hitachi Energy RTU500 series CMU firmware
- Hitachi Energy RTU500 series CMU firmware
- Hitachi Energy RTU500 series CMU firmware
- Hitachi Energy RTU500 series CMU firmware
- Hitachi Energy RTU500 series CMU firmware
Weakness type
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