VULNERABILITY INTELLIGENCE
CVE-2026-17539
CVSS score5.9 MEDIUM
EPSS probability0.37%
CISA KEVNot currently listed
Published2026-09-03
Last modified2026-09-03
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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.
Weakness classification
- cybersecurity@hitachienergy.com: CWE-476