CVE-2026-17539: CWE-476 NULL pointer dereference in Hitachi Energy RTU500 series CMU firmware
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.
CVE-2026-17539: CWE-476 NULL pointer dereference in Hitachi Energy RTU500 series CMU firmware
Description
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.
CVSS v3.1
Score 5.9medium
Affected software
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Hitachi Energy
- Date Reserved
- 2026-07-27T09:46:09.631Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a992adaacd9273b49a53d86
Added to database: 09/03/2026, 08:07:54 UTC
Last updated: 09/03/2026, 23:01:37 UTC
Views: 14
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